Fix undefined variable return

CRM/Activityprofile/APIWrappers/Profile.php

@@ -164,7 +164,7 @@ class CRM_Activityprofile_APIWrappers_Profile {
 
     // This can happen during a cache-clear
     if (empty($apiRequest['params']['profile_id'])) {
-      return $return;
+      return $result;
     }
 
     // Avoid pseudo profiles, ex: Billing