wchar, wctype-h: fix for MinGW 3.22.2 * lib/wchar.in.h [__MINGW32__]: Add one more condition for special invocation, to fix issues with MinGW 3.22.2 wchar.h when included from <string.h>. * lib/wctype.in.h [__MINGW32__]: Add special invocation convention for MinGW 3.22.2, to solve issues with their wctype.h when included from <ctype.h>.