vsnprintf fix?

#if defined(TORQUE_OS_WIN) || defined(TORQUE_OS_XBOX) || defined(TORQUE_OS_XENON)
   wchar_t wstr[4096];
   std::mbstowcs(wstr, buffer, 4096);
   S32 len = FormatMessage(NULL, format, 0, 0, wstr, bufferSize, &args);
#else
   S32 len = vsnprintf(buffer, bufferSize, format, args);
#endif