X-Vine: Fixes


git-svn-id: https://gnunet.org/svn/gnunet@34303 140774ce-b5e7-0310-ab8b-a85725594a96
xvine: remove warnings


git-svn-id: https://gnunet.org/svn/gnunet@34304 140774ce-b5e7-0310-ab8b-a85725594a96