/**
* Check whether a script, be it AI or GS, is dead in this slot.
* @note Also returns dead for AI slots which are currently occupied
*       by Human Companies or when the AI didn't start.
* @note Also returns dead when no GS was set up.
* @param slot The slot that is checked.
* @return true if the slot that is checked is dead.
*/
static bool IsDead(CompanyID slot)
{
	if (slot == OWNER_DEITY) {
		return Game::GetInstance() == NULL || Game::GetInstance()->IsDead();
	} else {
		return !Company::IsValidAiID(slot) || Company::Get(slot)->ai_instance->IsDead();
	}
}