Check Metadata Class info exists

Sometimes, Metadata ReflectionClass is null and throws:

PHP Fatal error:  Call to a member function getName() on a non-object in vendor/symfony-cmf/routing-bundle/Doctrine/RouteConditionMetadataListener.php on line 52

i.e. I get this error when I try to use doctrine:generate:entities command using orm persistence.

Author: gerfigna

Doctrine/RouteConditionMetadataListener.php

@@ -49,6 +49,11 @@ public function loadClassMetadata(LoadClassMetadataEventArgs $eventArgs)
         }
 
         $meta = $eventArgs->getClassMetadata();
+
+        if (null === $meta->getReflectionClass()) {
+            return;
+        }
+
         if ($meta->getReflectionClass()->getName() !== 'Symfony\Component\Routing\Route') {
             return;
         }