Disable error flash message for terfe2 controllers

html/typo3conf/ext/ter_fe2/Classes/Controller/AbstractController.php

@@ -19,7 +19,6 @@ namespace T3o\TerFe2\Controller;
  */
 abstract class AbstractController extends \TYPO3\CMS\Extbase\Mvc\Controller\ActionController
 {
-
     /**
      * @var \T3o\TerFe2\Security\Role;
      */
@@ -47,6 +46,11 @@ abstract class AbstractController extends \TYPO3\CMS\Extbase\Mvc\Controller\Acti
         }
     }
 
+    protected function addErrorFlashMessage()
+    {
+        // Do NOT add an error flash message, output validation errors only
+    }
+
     /**
      * Translate a label
      *
@@ -60,7 +64,6 @@ abstract class AbstractController extends \TYPO3\CMS\Extbase\Mvc\Controller\Acti
         return \TYPO3\CMS\Extbase\Utility\LocalizationUtility::translate($label, $extensionKey, $arguments);
     }
 
-
     /**
      * Send flash message and redirect to given action
      *
@@ -87,7 +90,6 @@ abstract class AbstractController extends \TYPO3\CMS\Extbase\Mvc\Controller\Acti
         $this->redirect($action, $controller, $extension, $arguments);
     }
 
-
     /**
      * Send flash message and forward to given action
      *
@@ -105,7 +107,6 @@ abstract class AbstractController extends \TYPO3\CMS\Extbase\Mvc\Controller\Acti
         $this->forward($action, $controller, $extension, $arguments);
     }
 
-
     /**
      * Send flash message and redirect to given action
      *
@@ -123,7 +124,6 @@ abstract class AbstractController extends \TYPO3\CMS\Extbase\Mvc\Controller\Acti
         $this->redirect($action, $controller, $extension, $arguments);
     }
 
-
     /**
      * Send flash message and forward to given action
      *
@@ -141,7 +141,6 @@ abstract class AbstractController extends \TYPO3\CMS\Extbase\Mvc\Controller\Acti
         $this->forward($action, $controller, $extension, $arguments);
     }
 
-
     /**
      * Clear cache of given pages
      *
@@ -156,7 +155,6 @@ abstract class AbstractController extends \TYPO3\CMS\Extbase\Mvc\Controller\Acti
         }
     }
 
-
     /**
      * Adds the base uri if not already in place.
      *