Ticket #9571: 9571.diff

link-template.php

@@ -875 +875 @@
 
         $join = '';
         $posts_in_ex_cats_sql = '';
+        $excluded_categories = apply_filters("get_{$adjacent}_post_excluded", $excluded_categories);
         if ( $in_same_cat || !empty($excluded_categories) ) {
                 $join = " INNER JOIN $wpdb->term_relationships AS tr ON p.ID = tr.object_id INNER JOIN $wpdb->term_taxonomy tt ON tr.term_taxonomy_id = tt.term_taxonomy_id";