Slay Undead Fix **Priority

[seveianrex]

Sorry for the additional thread. An important change is needed for this recent fix.

In {attack.cpp} function TryCriticalHit()

	if(defender && defender->GetBodyType() == BT_Undead || defender->GetBodyType() == BT_SummonedUndead || defender->GetBodyType() == BT_Vampire){
		switch(GetAA(aaSlayUndead)){
			case 1:
				critMod += 33;
				break;
			case 2:
				critMod += 66;
				break;
			case 3:
				critMod += 100;
				break;
		}
                if (GetAA(aaSlayUndead) > 0)
		    slayUndeadCrit = true;
	}