Merge pull request #1847 from loalf/avoid-type-conversion

[Loggable][Bug] Avoid performing a type conversion

Author: l3pp4rd

lib/Gedmo/Loggable/Entity/Repository/LogEntryRepository.php

@@ -56,7 +56,7 @@ public function getLogEntriesQuery($entity)
         $dql .= " AND log.objectClass = :objectClass";
         $dql .= " ORDER BY log.version DESC";
 
-        $objectId = $wrapped->getIdentifier();
+        $objectId = (string) $wrapped->getIdentifier();
         $q = $this->_em->createQuery($dql);
         $q->setParameters(compact('objectId', 'objectClass'));