obvious(?) typo in libstdc++-v3/src/c++98/locale.cc

[Benjamin Kosnik]

> The typo is obvious, but whether or not the wrapped code still works
> isn't (to me).
> 
> 	* src/c++98/locale.cc (locale::facet::_S_get_c_locale): Fix
> typo.

Please check this in.

-benjamin