[PATCH 1/2] msvcrt: Inline MSVCRT__towlower_l with an internal helper.

[Piotr Caban]

Hi Rémi,

I think it would be better to fix it by creating temporary locale_t 
object when NULL is passed. This way we can avoid adding multiple 
internal functions (it will also make it possible to reuse it in more 
functions in future). _get_current_locale is buggy but it should be good 
enough in this case (you can also introduce get_current_locale_noalloc 
and free_locale_noalloc that avoids allocation to speed things up).

Thanks,
Piotr