Ticket #20218: post.diff

/Users/gustavobordoni/

@@ -5183 +5183 @@
         if ( $post && $thumbnail_id && get_post( $thumbnail_id ) ) {
                 $thumbnail_html = wp_get_attachment_image( $thumbnail_id, 'thumbnail' );
                 if ( ! empty( $thumbnail_html ) ) {
-                        update_post_meta( $post->ID, '_thumbnail_id', $thumbnail_id );
-                        return true;
+                        return update_post_meta( $post->ID, '_thumbnail_id', $thumbnail_id );
                 }
         }
         return false;