Simplified and enhanced util.freeze()

lib/util.js

@@ -62,17 +62,13 @@ var can_define_prop = ( function()
  *
  * @return  {Object}  object passed to function
  */
-exports.freeze = function( obj )
-{
-    // if freezing is not supported (ES5), do nothing
-    if ( Object.freeze === undefined )
+exports.freeze = ( typeof Object.freeze === 'function' )
+    ? Object.freeze
+    : function( obj )
     {
         return;
     }
-
-    Object.freeze( obj );
-    return obj;
-};
+;
 
 
 /**