[Admin] User : correctif création

backend/controllers/UserController.php

@@ -149,7 +149,7 @@ class UserController extends BackendController
                     $model->address,
                     $model->newsletter,
                     Password::generate(),
-                    $model->send_mail_welcome
+                    (bool) $model->send_mail_welcome
                 );
                 $userCreate->points_sale = $model->points_sale;
                 $userCreate->user_groups = $model->user_groups;