don't bother checking dav acl's in files

any permissions for files is handled in the filesystem layer anyway

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

apps/dav/lib/Connector/Sabre/DavAclPlugin.php

@@ -75,6 +75,11 @@ class DavAclPlugin extends \Sabre\DAVACL\Plugin {
 	}
 
 	public function propFind(PropFind $propFind, INode $node) {
+		if ($node instanceof Node) {
+			// files don't use dav acls
+			return;
+		}
+
 		// If the node is neither readable nor writable then fail unless its of
 		// the standard user-principal
 		if (!($node instanceof User)) {