number of bytes when using multibyte characters, so that multibyte
strings aren't prematurely cut off; also allow the "View" state to be
displayed when a filename is passed in, in case we're in multibuffer
mode and inside the file browser


git-svn-id: svn://svn.savannah.gnu.org/nano/trunk/nano@2424 35c25a1d-7b9e-4130-9fde-d3aeb78583b8