Fixes issue when getting annotation from Proxy

Sometimes Doctrine will give you Proxy classes instead of the concrete class. When this happens the ReflectionClass will not be able to get the annotation from the Proxy class.

Mapping/Driver/Annotation.php

@@ -3,6 +3,7 @@
 namespace Lexik\Bundle\MailerBundle\Mapping\Driver;
 
 use Doctrine\Common\Annotations\Reader;
+use Doctrine\ORM\Proxy\Proxy;
 
 /**
  * Driver to find values of annotated properties.
@@ -59,6 +60,11 @@ private function findValue($obj, $className)
     {
         $reflClass = new \ReflectionClass($obj);
 
+        // Make sure we are not using a Proxy class
+        if ($obj instanceof Proxy) {
+            $reflClass = $reflClass->getParentClass();
+        }
+
         // Find on property
         foreach ($reflClass->getProperties(\ReflectionProperty::IS_PUBLIC) as $property) {
             if ($this->reader->getPropertyAnnotation($property, $className)) {
@@ -73,4 +79,4 @@ private function findValue($obj, $className)
             }
         }
     }
-}
+}