msvcrt: Don't forward wcsncmp to ntdll.

dlls/msvcrt/msvcrt.spec

@@ -1492,7 +1492,7 @@
 @ cdecl wcslen(wstr) MSVCRT_wcslen
 @ cdecl wcsncat(wstr wstr long) ntdll.wcsncat
 @ cdecl wcsncat_s(wstr long wstr long) MSVCRT_wcsncat_s
-@ cdecl wcsncmp(wstr wstr long) ntdll.wcsncmp
+@ cdecl wcsncmp(wstr wstr long) MSVCRT_wcsncmp
 @ cdecl wcsncpy(ptr wstr long) MSVCRT_wcsncpy
 @ cdecl wcsncpy_s(ptr long wstr long) MSVCRT_wcsncpy_s
 @ cdecl wcsnlen(wstr long) MSVCRT_wcsnlen

dlls/msvcrt/wcs.c

@@ -1923,3 +1923,11 @@ __int64 CDECL _wtoi64(const MSVCRT_wchar_t *str)
 {
     return _wtoi64_l(str, NULL);
 }
+
+/*********************************************************************
+ *           wcsncmp    (MSVCRT.@)
+ */
+int CDECL MSVCRT_wcsncmp(const MSVCRT_wchar_t *str1, const MSVCRT_wchar_t *str2, int n)
+{
+    return strncmpW(str1, str2, n);
+}