Dead NPCs shouldn't run the full update-routine

[ataulien]

I noticed that dead NPCs are still trying to move to waypoints or other targets. The Event-Manager, Collision, animations, etc aren't really needed if the NPC is dead.

[tomedi]

I recognized that dead npcs won't stay lying on the ground but rather stand when you return to them. Has this something to do with this issue?

[dgalli1]

@tomedi as far as i remember this was also the case in the original gothic they just fell to the ground after some time.