turn string functions that don't take length arguments into wrappers for
the versions that take length arguments, add multibyte equivalent of
strlen(), and fix potential segfault in mbstrnlen()


git-svn-id: svn://svn.savannah.gnu.org/nano/trunk/nano@2300 35c25a1d-7b9e-4130-9fde-d3aeb78583b8
3 files changed