Fix event.remove when called during event.dispatch

lime/app/Event.hx

@@ -51,17 +51,15 @@ class Event<T> {
 			
 			var listeners = $ethis.listeners;
 			var repeat = $ethis.repeat;
-			var length = listeners.length;
 			var i = 0;
 			
-			while (i < length) {
+			while (i < listeners.length) {
 				
 				listeners[i] ($a{args});
 				
 				if (!repeat[i]) {
 					
 					$ethis.remove (listeners[i]);
-					length--;
 					
 				} else {