Make sure we only fetch the file by id for the actual owner

Otherwise this will fetch all mounts for the file id which is quite
expensive and causes long saving times in big sharing structures

Signed-off-by: Julius Härtl <jus@bitgrid.net>

apps/files_versions/lib/Storage.php

@@ -183,7 +183,7 @@ class Storage {
 		$eventDispatcher = \OC::$server->getEventDispatcher();
 		$fileInfo = $files_view->getFileInfo($filename);
 		$id = $fileInfo->getId();
-		$nodes = \OC::$server->getRootFolder()->getById($id);
+		$nodes = \OC::$server->getRootFolder()->getUserFolder($uid)->getById($id);
 		foreach ($nodes as $node) {
 			$event = new CreateVersionEvent($node);
 			$eventDispatcher->dispatch('OCA\Files_Versions::createVersion', $event);