Stalemate detection

[Archiatrus]

Should be possible to detect if there are only flying buildings. From that moment start a timer of X minutes until draw.

[Archiatrus]

My solution:

for (auto i(0); i< response->game_info().player_info_size(); ++i)
{
    const auto& playerID = ActualObservation.player_common().player_id();
    const auto& playerInfo = response->game_info().player_info(i);
    if(playerInfo.player_id() == playerID && playerInfo.race_actual()==SC2APIProtocol::Race::Terran)
    {
        size_t totalHealth = 0U;
        for (auto ii(0); ii< ActualObservation.raw_data().units_size(); ++ii)
        {
            const auto unit = ActualObservation.raw_data().units(ii);
            if (unit.alliance() != SC2APIProtocol::Alliance::Self)
            {
                continue;
            }
            // This can be abused. Hide a worker somewhere.
            // But the solution is proper seek and destroy code of the attacker.
            // And it would gain nothing because a tie is a tie.
            if (!unit.is_flying())
            {
                lastGameLoopWithNonFlyer = currentGameLoop;
                break;
            }
            else
            {
                totalHealth+=unit.health();
            }
        }
        // If the flying building(s) gets attacked it is not a stalemate
        if (totalHealth_old != totalHealth)
        {
            totalHealth_old = totalHealth;
            lastGameLoopWithNonFlyer = currentGameLoop;
        }
    }
}
if (currentGameLoop - lastGameLoopWithNonFlyer > maxLoopsWithoutNonFlyer)
{
    std::cout << "DETECTED STALEMATE!!!!" << std::endl;
    CurrentExitCase = ExitCase::Stalemate;
}

Did I miss an obvious or not so obvious corner case?