Passing correct argument, is_predecessor to select_closest_peer()


git-svn-id: https://gnunet.org/svn/gnunet@33789 140774ce-b5e7-0310-ab8b-a85725594a96
-use LOG macro instead of GNUNET_log_from

git-svn-id: https://gnunet.org/svn/gnunet@33790 140774ce-b5e7-0310-ab8b-a85725594a96