-fix warnings

git-svn-id: https://gnunet.org/svn/gnunet@33655 140774ce-b5e7-0310-ab8b-a85725594a96
Xvine_DHT: Minor fixes


git-svn-id: https://gnunet.org/svn/gnunet@33656 140774ce-b5e7-0310-ab8b-a85725594a96