Ticket #37227: 37227-twentythirteen.diff

twentythirteen/functions.php

@@ -421 +421 @@
 
         // If there is more than 1 attachment in a gallery...
         if ( count( $attachment_ids ) > 1 ) {
-                foreach ( $attachment_ids as $attachment_id ) {
+                foreach ( $attachment_ids as $idx => $attachment_id ) {
                         if ( $attachment_id == $post->ID ) {
-                                $next_id = current( $attachment_ids );
+                                $next_id = $attachment_ids[ ( $idx + 1 ) % count( $attachment_ids ) ];
                                 break;
                         }
                 }