ZF-12006: FlashMessenger does not update messageAdded variable when message is added

git-svn-id: http://framework.zend.com/svn/framework/standard/trunk@24813 44c647ce-9c0f-0410-b52a-842ac1e357ba

library/Zend/Controller/Action/Helper/FlashMessenger.php

@@ -155,6 +155,7 @@ class Zend_Controller_Action_Helper_FlashMessenger extends Zend_Controller_Actio
         }
 
         self::$_session->{$namespace}[] = $message;
+        self::$_messageAdded = true;
 
         return $this;
     }