message: fix crash on Cygwin
diff: @@ -733,7 +733,8 @@ void swServer_init(swServer *serv)
  serv->timezone = timezone;
  #else
  struct timezone tz;
  - gettimeofday(nullptr, &tz);
  + struct timeval tv;
  + gettimeofday(&tv, &tz);
  serv->timezone = tz.tz_minuteswest * 60;
  #endif
  