* files.c (read_file) - Add parameter for whether we should even try to check
          file writability, as the message is useless when we're inserting into an
          existing buffer.  Fixes Savannah bug 28219.



git-svn-id: svn://svn.savannah.gnu.org/nano/trunk/nano@4460 35c25a1d-7b9e-4130-9fde-d3aeb78583b8