Error Paginacion

les dejo el codigo

/* PAGINATION
	================================================== */

	/* Function that Rounds To The Nearest Value.
	   Needed for the pagenavi() function */
	function round_num($num, $to_nearest) {
	   /*Round fractions down (http://php.net/manual/en/function.floor.php)*/
	   return floor($num/$to_nearest)*$to_nearest;
	}

	/* Function that performs a Boxed Style Numbered Pagination (also called Page Navigation).
	   Function is largely based on Version 2.4 of the WP-PageNavi plugin */
	function pagenavi($query, $before = '', $after = '') {

	    wp_reset_query();
	    global $wpdb, $paged;

	    $pagenavi_options = array();
	    //$pagenavi_options['pages_text'] = ('Page %CURRENT_PAGE% of %TOTAL_PAGES%:');
	    $pagenavi_options['pages_text'] = ('');
	    $pagenavi_options['current_text'] = '%PAGE_NUMBER%';
	    $pagenavi_options['page_text'] = '%PAGE_NUMBER%';
	    $pagenavi_options['first_text'] = ('First Page');
	    $pagenavi_options['last_text'] = ('Last Page');
	    $pagenavi_options['next_text'] = __("Next <i class='icon-angle-right'></i>", "swiftframework");
	    $pagenavi_options['prev_text'] = __("<i class='icon-angle-left'></i> Previous", "swiftframework");
	    $pagenavi_options['dotright_text'] = '...';
	    $pagenavi_options['dotleft_text'] = '...';
	    $pagenavi_options['num_pages'] = 10; //continuous block of page numbers
	    $pagenavi_options['always_show'] = 0;
	    $pagenavi_options['num_larger_page_numbers'] = 0;
	    $pagenavi_options['larger_page_numbers_multiple'] = 5;

	 	$output = "";

	    //If NOT a single Post is being displayed
	    /*http://codex.wordpress.org/Function_Reference/is_single)*/
	    if (!is_single()) {
	        $request = $query->request;
	        //intval — Get the integer value of a variable
	        /*http://php.net/manual/en/function.intval.php*/
	        $posts_per_page = intval(get_query_var('posts_per_page'));
	        //Retrieve variable in the WP_Query class.
	        /*http://codex.wordpress.org/Function_Reference/get_query_var*/
	        if ( get_query_var('paged') ) {
	        $paged = get_query_var('paged');
	        } elseif ( get_query_var('page') ) {
	        $paged = get_query_var('page');
	        } else {
	        $paged = 1;
	        }
	        $numposts = $query->found_posts;
	        $max_page = $query->max_num_pages;

	        //empty — Determine whether a variable is empty
	        /*http://php.net/manual/en/function.empty.php*/
	        if(empty($paged) || $paged == 0) {
	            $paged = 1;
	        }

	        $pages_to_show = intval($pagenavi_options['num_pages']);
	        $larger_page_to_show = intval($pagenavi_options['num_larger_page_numbers']);
	        $larger_page_multiple = intval($pagenavi_options['larger_page_numbers_multiple']);
	        $pages_to_show_minus_1 = $pages_to_show - 1;
	        $half_page_start = floor($pages_to_show_minus_1/2);
	        //ceil — Round fractions up (http://us2.php.net/manual/en/function.ceil.php)
	        $half_page_end = ceil($pages_to_show_minus_1/2);
	        $start_page = $paged - $half_page_start;

	        if($start_page <= 0) {
	            $start_page = 1;
	        }

	        $end_page = $paged + $half_page_end;
	        if(($end_page - $start_page) != $pages_to_show_minus_1) {
	            $end_page = $start_page + $pages_to_show_minus_1;
	        }
	        if($end_page > $max_page) {
	            $start_page = $max_page - $pages_to_show_minus_1;
	            $end_page = $max_page;
	        }
	        if($start_page <= 0) {
	            $start_page = 1;
	        }

	        $larger_per_page = $larger_page_to_show*$larger_page_multiple;
	        //round_num() custom function - Rounds To The Nearest Value.
	        $larger_start_page_start = (round_num($start_page, 10) + $larger_page_multiple) - $larger_per_page;
	        $larger_start_page_end = round_num($start_page, 10) + $larger_page_multiple;
	        $larger_end_page_start = round_num($end_page, 10) + $larger_page_multiple;
	        $larger_end_page_end = round_num($end_page, 10) + ($larger_per_page);

	        if($larger_start_page_end - $larger_page_multiple == $start_page) {
	            $larger_start_page_start = $larger_start_page_start - $larger_page_multiple;
	            $larger_start_page_end = $larger_start_page_end - $larger_page_multiple;
	        }
	        if($larger_start_page_start <= 0) {
	            $larger_start_page_start = $larger_page_multiple;
	        }
	        if($larger_start_page_end > $max_page) {
	            $larger_start_page_end = $max_page;
	        }
	        if($larger_end_page_end > $max_page) {
	            $larger_end_page_end = $max_page;
	        }
	        if($max_page > 1 || intval($pagenavi_options['always_show']) == 1) {
	            /*http://php.net/manual/en/function.str-replace.php */
	            /*number_format_i18n(): Converts integer number to format based on locale (wp-includes/functions.php*/
	            $pages_text = str_replace("%CURRENT_PAGE%", number_format_i18n($paged), $pagenavi_options['pages_text']);
	            $pages_text = str_replace("%TOTAL_PAGES%", number_format_i18n($max_page), $pages_text);
	            $output .= $before.'<ul class="pagenavi">'."\n";

	            if(!empty($pages_text)) {
	                $output .= '<li><span class="pages">'.$pages_text.'</span></li>';
	            }
	            //Displays a link to the previous post which exists in chronological order from the current post.
	            /*http://codex.wordpress.org/Function_Reference/previous_post_link*/
	            if ($paged > 1) {
	            $output .= '<li class="prev">' . get_previous_posts_link($pagenavi_options['prev_text']) . '</li>';
	 			}

	            if ($start_page >= 2 && $pages_to_show < $max_page) {
	                $first_page_text = str_replace("%TOTAL_PAGES%", number_format_i18n($max_page), $pagenavi_options['first_text']);
	                //esc_url(): Encodes < > & " ' (less than, greater than, ampersand, double quote, single quote).
	                /*http://codex.wordpress.org/Data_Validation*/
	                //get_pagenum_link():(wp-includes/link-template.php)-Retrieve get links for page numbers.
	                $output .= '<li><a href="'.esc_url(get_pagenum_link()).'" class="first" title="'.$first_page_text.'">1</a></li>';
	                if(!empty($pagenavi_options['dotleft_text'])) {
	                    $output .= '<li><span class="expand">'.$pagenavi_options['dotleft_text'].'</span></li>';
	                }
	            }

	            if($larger_page_to_show > 0 && $larger_start_page_start > 0 && $larger_start_page_end <= $max_page) {
	                for($i = $larger_start_page_start; $i < $larger_start_page_end; $i+=$larger_page_multiple) {
	                    $page_text = str_replace("%PAGE_NUMBER%", number_format_i18n($i), $pagenavi_options['page_text']);
	                    $output .= '<li><a href="'.esc_url(get_pagenum_link($i)).'" class="single_page" title="'.$page_text.'">'.$page_text.'</a></li>';
	                }
	            }

	            for($i = $start_page; $i  <= $end_page; $i++) {
	                if($i == $paged) {
	                    $current_page_text = str_replace("%PAGE_NUMBER%", number_format_i18n($i), $pagenavi_options['current_text']);
	                    $output .= '<li><span class="current">'.$current_page_text.'</span></li>';
	                } else {
	                    $page_text = str_replace("%PAGE_NUMBER%", number_format_i18n($i), $pagenavi_options['page_text']);
	                    $output .= '<li><a href="'.esc_url(get_pagenum_link($i)).'" class="single_page" title="'.$page_text.'">'.$page_text.'</a></li>';
	                }
	            }

	            if ($end_page < $max_page) {
	                if(!empty($pagenavi_options['dotright_text'])) {
	                    $output .= '<li><span class="expand">'.$pagenavi_options['dotright_text'].'</span></li>';
	                }
	                $last_page_text = str_replace("%TOTAL_PAGES%", number_format_i18n($max_page), $pagenavi_options['last_text']);
	                $output .= '<li><a href="'.esc_url(get_pagenum_link($max_page)).'" class="last" title="'.$last_page_text.'">'.$max_page.'</a></li>';
	            }
	            $output .= '<li class="next">' . get_next_posts_link($pagenavi_options['next_text'], $max_page) . '</li>';

	            if($larger_page_to_show > 0 && $larger_end_page_start < $max_page) {
	                for($i = $larger_end_page_start; $i <= $larger_end_page_end; $i+=$larger_page_multiple) {
	                    $page_text = str_replace("%PAGE_NUMBER%", number_format_i18n($i), $pagenavi_options['page_text']);
	                    $output .= '<li><a href="'.esc_url(get_pagenum_link($i)).'" class="single_page" title="'.$page_text.'">'.$page_text.'</a></li>';
	                }
	            }
	            $output .= '</ul>'.$after."\n";
	        }
	    }

	    return $output;
	}