actually return the user when creating version dav nodes

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

apps/files_versions/lib/Sabre/VersionHome.php

@@ -57,6 +57,7 @@ class VersionHome implements ICollection {
 		if (!$user) {
 			throw new NoUserException();
 		}
+		return $user;
 	}
 
 	public function delete() {