%S %C vfprintf contribution

[Artem B. Bityuckiy]

Hello.

Here is the patch that makes vfprintf (and hence, all other vfprintf-based 
Xprintf functions) understand ISO C 90 %S (same as %ls) and %C (same as %lc) 
format placeholders. Please, review it and give us know if something is 
wrong.

This is tested a little bit- it works and it seems should work with any 
locale if wcrtomb and wcsrtomb functions work.

-- 
Best regards,
Artem B. Bityuckiy
SoftMine Corporation, Software Engineer
Tel.: +7(812)329-67-44, +7(812)329-67-45
Mobile: +79112449030
E-mail: abitytsky@softminecorp.com
Web: www.softminecorp.com

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