[PATCH 0/1] MR5547: msvcrt: Implement _mbsncpy_s[_l]().

[Paul Gofman (＠gofman)]

ucrtbase._mbsncpy_s is used by Marvel vs Capcom when trying to create multiplayer lobby.

The functions are also present in msvcrt (unlike msvcr70, msvcr71) where I didn't add it because it behaves differently: there is at least one weirdness when it doubles the number of characters to copy ('n' parameter, not buffer size). I suppose we don't need to explore and deal with this specific until something needs those functions from msvcrt.