chg: [event warnings] load the new behaviour and set the view variable with the contents

app/Controller/EventsController.php

@@ -1602,6 +1602,7 @@ class EventsController extends AppController
         $this->set('title_for_layout', __('Event #%s', $event['Event']['id']));
         $this->set('attribute_count', $attributeCount);
         $this->set('object_count', $objectCount);
+        $this->set('warnings', $this->Event->generateWarnings($event));
         $this->__eventViewCommon($user);
     }
 

app/Model/Event.php

@@ -28,6 +28,7 @@ class Event extends AppModel
             'change' => 'full'),
         'Trim',
         'Containable',
+        'EventWarning'
     );
 
     public $displayField = 'id';