miscellaneous fixes: skip over invalid wide characters, and if wcwidth()
returns -1, don't add its value to any column counter; also update
another copyright year


git-svn-id: svn://svn.savannah.gnu.org/nano/trunk/nano@2219 35c25a1d-7b9e-4130-9fde-d3aeb78583b8
2 files changed