AdminController : setPosition on persist

ShopBundle/Controller/Admin/AdminController.php

                 }
 
                 $this->setUpdated($entity) ;
-                $entity->setPosition(0) ;
+
+                if (method_exists($entity, 'setPosition')) {
+                        $entity->setPosition(0) ;
+                }
 
                 parent::persistEntity($entity);
         }