* nano.c (main), prompt.c (do_statusbar_input): Handle problems with an unmapped 
          function due to key rebinding, fixes crashes on FreeBSD repoted by Eitan 
          Adler <eitanadlerlist@gmail.com>.



git-svn-id: svn://svn.savannah.gnu.org/nano/trunk/nano@4475 35c25a1d-7b9e-4130-9fde-d3aeb78583b8