Fix a bug with smb notify having leading slash when it should not

Signed-off-by: Ari Selseng <ari@selseng.net>

Author: ariselseng

apps/files_external/lib/Command/Notify.php

@@ -155,7 +155,7 @@ private function createStorage(StorageConfig $mount) {
 	}
 
 	private function markParentAsOutdated($mountId, $path) {
-		$parent = dirname($path);
+		$parent = ltrim(dirname($path), '/');
 		if ($parent === '.') {
 			$parent = '';
 		}