CC-5040:

All API actions need to have consistent return value

-temp fix. Correct fix will require ensuring api_client always sends
XmlHttpRequest

airtime_mvc/application/controllers/ApiController.php

@@ -961,7 +961,7 @@ class ApiController extends Zend_Controller_Action
             $file->save();
         }
 
-        $this->view->msg = "OK";
+        echo json_encode(array());
     }
     
     public function updateCueValuesBySilanAction()