Ticket #10908: 10908.diff

wp-includes/query.php

@@ -1918 +1918 @@
                         $q['cat'] = $reqcat;
 
                         $join = " INNER JOIN $wpdb->term_relationships ON ($wpdb->posts.ID = $wpdb->term_relationships.object_id) INNER JOIN $wpdb->term_taxonomy ON ($wpdb->term_relationships.term_taxonomy_id = $wpdb->term_taxonomy.term_taxonomy_id) ";
-                        $whichcat = " AND $wpdb->term_taxonomy.taxonomy = 'category' ";
+                        $whichcat .= " AND $wpdb->term_taxonomy.taxonomy = 'category' ";
                         $in_cats = array($q['cat']);
                         $in_cats = array_merge($in_cats, get_term_children($q['cat'], 'category'));
                         $in_cats = "'" . implode("', '", $in_cats) . "'";