fix Fix Observer Enemy Guild under Map War

[Rakancito 6943]

It's very simple, I suppose some must already have FIX but most do not.

When you give Guild War Under Map if an Observer from your guild enters War and the enemy kills it, the counter will count it causing you to lose the war if they are many observers., although it can only kill you once, it continues to be an advantage.
 

Search in battle.cpp

bool battle_is_attackable(LPCHARACTER ch, LPCHARACTER victim)
{
	if (victim->IsDead())
		return false;

after this add:
 

	if (victim->IsObserverMode())
		return false;

 

Now its fixed.