Merge pull request #2427 from EliuFlorez/patch-3

Cast implemented events to an array when detaching listeners.

This makes it much simpler to work with mocks, and avoids warnings caused by developer error.

lib/Cake/Event/CakeEventManager.php

@@ -197,7 +197,7 @@ class CakeEventManager {
  * @return void
  */
 	protected function _detachSubscriber(CakeEventListener $subscriber, $eventKey = null) {
-		$events = $subscriber->implementedEvents();
+		$events = (array)$subscriber->implementedEvents();
 		if (!empty($eventKey) && empty($events[$eventKey])) {
 			return;
 		} elseif (!empty($eventKey)) {