add __discarded flag and ignore delayed action if discarded

Author: whoozle

core/Context.qml

@@ -142,11 +142,13 @@ Item {
 
 	///@private
 	function delayedAction(name, self, method, delay) {
-		if (!self._registerDelayedAction(name))
+		if (self.__discarded || !self._registerDelayedAction(name))
 			return
 
 		var callback = function() {
 			self._cancelDelayedAction(name)
+			if (self.__discarded)
+				return
 			method.call(self)
 		}
 

core/EventEmitter.qml

@@ -14,6 +14,7 @@ CoreObject {
 	}
 
 	function discard() {
+		this.__discarded = true
 		this.removeAllOn()
 		for(var name in this._eventHandlers)
 			this.removeAllListeners(name)