Suppressed Warning that breaks our JSON output

If the object files dir wasn't opened, opendir echoes a Warning (probably depends on PHP settings), which would break our JSON. Fixed that

Author: tzikis

Symfony/src/Codebender/CompilerBundle/Handler/DeletionHandler.php

@@ -43,7 +43,7 @@ function deleteAllObjects(&$success, &$fileCount, &$deletionStats, &$undeletedFi
 			"success_dot_LOCK" => 0,
 			"failure_dot_LOCK" => 0);
 
-		if ($handle = opendir($this->object_directory))
+		if ($handle = @opendir($this->object_directory))
 		{
 			$success = true;
 
@@ -80,7 +80,7 @@ function deleteSpecificObjects(&$success, &$response, &$option, &$to_delete)
 		$response["deleted_files"] = "";
 		$response["undeleted_files"] = "";
 
-		if ($handle = opendir($this->object_directory))
+		if ($handle = @opendir($this->object_directory))
 		{
 			while (false !== ($entry = readdir($handle)))
 			{