* src/files.c (do_lockfile, open_file): If locking fails,
        allow the lock failure message to be preserved AND
        preserve the filename passed on the cmdline.  Fixes
        Savannah bug #42668.



git-svn-id: svn://svn.savannah.gnu.org/nano/trunk/nano@5059 35c25a1d-7b9e-4130-9fde-d3aeb78583b8