parameters for wide char to multibyte conversion. Call
__set_lc_messages_from_win on Cygwin.
* libc/locale/lmessages.h: Make C++-safe.
(__messages_load_locale): Change declaration.
* libc/locale/lmonetary.c (__monetary_load_locale): Use
_monetary_locale_buf as buffer pointer.
* libc/locale/lnumeric.c (__numeric_load_locale): Use
_numeric_locale_buf as buffer pointer.
* libc/locale/timelocal.c (__time_load_locale): Use time_locale_buf
as buffer pointer.
* libc/locale/locale.c (loadlocale): Enable loading LC_MESSAGES data
on Cygwin.