[svn] * Raise modify scale limit from 3 to 10 for players

* Implement immunity totems from periodic damage spell effects. Source: Mangos
* Implemented second choice aggro targets for creatures. Source: Mangos

--HG--
branch : trunk

src/game/ThreatManager.cpp

@@ -267,12 +267,27 @@ HostilReference* ThreatContainer::selectNextVictim(Creature* pAttacker, HostilRe
 {
     HostilReference* currentRef = NULL;
     bool found = false;
+    
+    std::list<HostilReference*>::iterator lastRef = iThreatList.end();
+    lastRef--;
+    
     for(std::list<HostilReference*>::iterator iter = iThreatList.begin(); iter != iThreatList.end() && !found; ++iter)
     {
         currentRef = (*iter);
 
         Unit* target = currentRef->getTarget();
         assert(target);                                     // if the ref has status online the target must be there !
+        
+        // some units are prefered in comparison to others
+        if(iter != lastRef && (target->IsImmunedToDamage(pAttacker->GetMeleeDamageSchoolMask(), false) ||
+                target->hasUnitState(UNIT_STAT_CONFUSED | UNIT_STAT_FLEEING)
+                ) )
+        {
+            // current victim is a second choice target, so don't compare threat with it below
+            if(currentRef == pCurrentVictim)
+                pCurrentVictim = NULL;
+            continue;
+        }
 
         if(!pAttacker->IsOutOfThreatArea(target))           // skip non attackable currently targets
         {