[Performance] Reduced CPU footprint in non-combat zones doing constant checks for combat related activities

zone/client_process.cpp

@@ -616,7 +616,7 @@ bool Client::Process() {
 	//At this point, we are still connected, everything important has taken
 	//place, now check to see if anybody wants to aggro us.
 	// only if client is not feigned
-	if(ret && !GetFeigned() && scanarea_timer.Check()) {
+	if(zone->CanDoCombat() && ret && !GetFeigned() && scanarea_timer.Check()) {
 		entity_list.CheckClientAggro(this);
 	}
 #endif