Ticket #8284: 8284.diff

wp-includes/query.php

@@ -1726 +1726 @@
                         $where .= " AND {$wpdb->posts}.ID NOT IN ($post__not_in)";
                 }
 
-                if ( is_integer($q['post_parent']) )
+                if ( is_numeric($q['post_parent']) )
                         $where .= $wpdb->prepare( " AND $wpdb->posts.post_parent = %d ", $q['post_parent'] );
 
                 if ( $q['page_id'] ) {