always setup fs for old webdav endpoint

Signed-off-by: Robin Appelman <robin@icewind.nl>

Author: icewind1991

apps/dav/appinfo/v1/webdav.php

@@ -69,6 +69,8 @@
 
 $requestUri = \OC::$server->getRequest()->getRequestUri();
 
+\OC_Util::setupFS();
+
 $server = $serverFactory->createServer($baseuri, $requestUri, $authPlugin, function () {
 	// use the view for the logged in user
 	return \OC\Files\Filesystem::getView();