Removed check to prevent event from being fixed twice. Unfortunately,…

… in IE this is sometimes necessary with its global event object. Binding both a mousedown and mousemove event is an example.

src/event.js

@@ -263,18 +263,11 @@ jQuery.event = {
 	},
 
 	fix: function(event) {
-		// Short-circuit if the event has already been fixed by jQuery.event.fix
-		if ( event[ expando ] )
-			return event;
-
 		// store a copy of the original event object 
 		// and clone to set read-only properties
 		var originalEvent = event;
 		event = jQuery.extend({}, originalEvent);
 
-		// Mark the event as fixed by jQuery.event.fix
-		event[ expando ] = true;
-
 		// add preventDefault and stopPropagation since 
 		// they will not work on the clone
 		event.preventDefault = function() {