Scripts/Misc: replace GetThreatListSize with GetThreatListPlayerCount to achieve the desired behavior

Author: ccrs

src/server/scripts/Northrend/AzjolNerub/Ahnkahet/boss_prince_taldaram.cpp

@@ -185,7 +185,7 @@ struct boss_prince_taldaram : public BossAI
                     break;
                 case EVENT_VANISH:
                 {
-                    if (me->GetThreatManager().GetThreatListSize() > 1)
+                    if (me->GetThreatManager().GetThreatListPlayerCount() > 1)
                     {
                         if (Unit* embraceTarget = SelectTarget(SelectTargetMethod::Random, 0, 100.0f, true))
                             _embraceTargetGUID = embraceTarget->GetGUID();

src/server/scripts/Northrend/Ulduar/Ulduar/boss_kologarn.cpp

@@ -368,7 +368,7 @@ class StoneGripTargetSelector
 
         bool operator()(WorldObject* target)
         {
-            if (target == _victim && _me->GetThreatManager().GetThreatListSize() > 1)
+            if (target == _victim && _me->GetThreatManager().GetThreatListPlayerCount() > 1)
                 return true;
 
             if (target->GetTypeId() != TYPEID_PLAYER)

src/server/scripts/Outland/Auchindoun/ShadowLabyrinth/boss_blackheart_the_inciter.cpp

@@ -138,7 +138,7 @@ struct boss_blackheart_the_inciter : public BossAI
             {
                 case EVENT_INCITE_CHAOS:
                 {
-                    if (me->GetThreatManager().GetThreatListSize() > 1)
+                    if (me->GetThreatManager().GetThreatListPlayerCount() > 1)
                     {
                         ResetThreatList();
                         DoCastSelf(SPELL_INCITE_CHAOS);