Ticket #18067: post-thumbnail-template.php.diff

post-thumbnail-template.php

@@ -50 +50 @@
 /**
  * Update cache for thumbnails in the current loop
  *
- * @sicne 3.2
+ * @since 3.2
+ *
+ * @param object $wp_query An instance of WP_Query with posts queried (optional)
  */
-function update_post_thumbnail_cache() {
-        global $wp_query;
+function update_post_thumbnail_cache( $wp_query = null ) {
+        if ( ! is_object( $wp_query ) || ! is_a( $wp_query, 'WP_Query' ) )
+                $wp_query =& $GLOBALS['wp_query'];
 
         if ( $wp_query->thumbnails_cached )
                 return;
@@ -64 +67 @@
                         $thumb_ids[] = $id;
         }
 
+        // filter out null/zero values (we may not need to query *at all*)
+        $thumb_ids = array_filter( $thumb_ids );
+
         if ( ! empty ( $thumb_ids ) ) {
                 get_posts( array(
                                 'update_post_term_cache' => false,