sensor profiler fix


git-svn-id: https://gnunet.org/svn/gnunet@34265 140774ce-b5e7-0310-ab8b-a85725594a96
fix for neigbours created multiple times


git-svn-id: https://gnunet.org/svn/gnunet@34266 140774ce-b5e7-0310-ab8b-a85725594a96