msvcrt: Added _towupper_l and _towlower_l implementation.

dlls/msvcrt/msvcrt.spec

@@ -980,8 +980,8 @@
 # stub _tolower_l(long ptr)
 @ cdecl _toupper(long) MSVCRT__toupper
 # stub _toupper_l(long ptr)
-# stub _towlower_l(long ptr)
-# stub _towupper_l(long ptr)
+@ cdecl _towlower_l(long ptr) MSVCRT__towlower_l
+@ cdecl _towupper_l(long ptr) MSVCRT__towupper_l
 @ extern _tzname MSVCRT__tzname
 @ cdecl _tzset() MSVCRT__tzset
 @ cdecl _ui64toa(int64 ptr long) ntdll._ui64toa

dlls/msvcrt/wcs.c

@@ -1445,3 +1445,19 @@ MSVCRT_size_t CDECL MSVCRT_wcsnlen(const MSVCRT_wchar_t *s, MSVCRT_size_t maxlen
         if (!s[i]) break;
     return i;
 }
+
+/*********************************************************************
+ *              _towupper_l (MSVCRT.@)
+ */
+int CDECL MSVCRT__towupper_l(MSVCRT_wint_t c, MSVCRT__locale_t locale)
+{
+    return toupperW(c);
+}
+
+/*********************************************************************
+ *              _towlower_l (MSVCRT.@)
+ */
+int CDECL MSVCRT__towlower_l(MSVCRT_wint_t c, MSVCRT__locale_t locale)
+{
+    return tolowerW(c);
+}