Fixes acceptData defining in the global scope.

src/data.js

@@ -121,7 +121,7 @@ jQuery.extend({
 	// A method for determining if a DOM node can handle the data expando
 	acceptData: function( elem ) {
 		if ( elem.nodeName ) {
-			match = jQuery.noData[ elem.nodeName.toLowerCase() ];
+			var match = jQuery.noData[ elem.nodeName.toLowerCase() ];
 
 			if ( match ) {
 				return !(match === true || elem.getAttribute("classid") !== match);