ctype.h: Add _to[w]lower_l and _to[w]upper_l declarations.

include/msvcrt/corecrt_wctype.h

@@ -24,6 +24,8 @@ extern "C" {
 #define _LEADBYTE     0x8000
 #define _ALPHA       (0x0100|_UPPER|_LOWER)  /* (C1_ALPHA|_UPPER|_LOWER) */
 
+wchar_t __cdecl _towlower_l(wchar_t,_locale_t);
+wchar_t __cdecl _towupper_l(wchar_t,_locale_t);
 int     __cdecl is_wctype(wint_t,wctype_t);
 int     __cdecl isleadbyte(int);
 int     __cdecl iswalnum(wint_t);

include/msvcrt/ctype.h

@@ -24,7 +24,9 @@ int __cdecl __iscsymf(int);
 int __cdecl __toascii(int);
 int __cdecl _isctype(int,int);
 int __cdecl _tolower(int);
+int __cdecl _tolower_l(int,_locale_t);
 int __cdecl _toupper(int);
+int __cdecl _toupper_l(int,_locale_t);
 int __cdecl isalnum(int);
 int __cdecl isalpha(int);
 int __cdecl iscntrl(int);