issue with Game::remove_road_forwards resulting in missing transporter

[tlongstretch]

I could never figure out the actual cause of this, but it was frequently setting serfs to Lost state and resulting in no transporter at the flag, breaking the player's economy. Simply disabling the set_lost_state seems to fix the problem, whatever the cause. I have been running this way since 2021 and haven't ever seen an issue as a result of skipping the set_lost_state call.

if (map->has_serf(pos)) {
  Serf *serf = get_serf_at_pos(pos);
  if (!map->has_flag(pos)) {
    serf->set_lost_state();
  } else {
    /* Handle serf close to flag, where
       it should only be lost if walking
       in the wrong direction. */
    int d = serf->get_walking_dir();
    if (d < 0) d += 6;
    if (d == reverse_direction(dir)) {
      //serf->set_lost_state();  // commenting this out appears to fix the problem with no side effects
    }
  }
}