Index: src/wp-includes/js/wp-lists.js
===================================================================
--- src/wp-includes/js/wp-lists.js	(revision 38666)
+++ src/wp-includes/js/wp-lists.js	(working copy)
@@ -789,9 +789,9 @@
 	init: function() {
 		var $list = this;
 
-		$list.wpList.process = function() {
-			$list.each( function( index, element ) {
-				this.wpList.process( element );
+		$list.wpList.process = function( a ) {
+			$list.each( function() {
+				this.wpList.process( a );
 			} );
 		};