From ec0c37192be6db917ec05c50b6e7b88b6f6500e8 Mon Sep 17 00:00:00 2001
From: Christian Flothmann <christian.flothmann@sensiolabs.de>
Date: Tue, 29 Jan 2019 19:24:09 +0100
Subject: [PATCH] [Form] fix some docblocks and type checks

---
 src/Symfony/Component/Form/AbstractType.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/Symfony/Component/Form/AbstractType.php b/src/Symfony/Component/Form/AbstractType.php
index 3509db5d94a9..1a9cfd75be7f 100644
--- a/src/Symfony/Component/Form/AbstractType.php
+++ b/src/Symfony/Component/Form/AbstractType.php
@@ -52,7 +52,7 @@ public function configureOptions(OptionsResolver $resolver)
      */
     public function getBlockPrefix()
     {
-        return StringUtil::fqcnToBlockPrefix(\get_class($this));
+        return StringUtil::fqcnToBlockPrefix(\get_class($this)) ?: '';
     }
 
     /**