Touch up patch for IE issue

Author: brandonaaron

jquery.mousewheel.js

@@ -48,10 +48,8 @@ $.fn.extend({
 
 
 function handler(event) {
-    var orgEvent = event, args = [].slice.call( arguments, 1 ), delta = 0, returnValue = true, deltaX = 0, deltaY = 0;
-    
     var orgEvent = event || window.event, args = [].slice.call( arguments, 1 ), delta = 0, returnValue = true, deltaX = 0, deltaY = 0;
-    event = $.event.fix(event || window.event);
+    event = $.event.fix(orgEvent);
     event.type = "mousewheel";
 
     // Old school scrollwheel delta