Scripts/AzjolNerub: minor corrections

ref #19072

src/server/scripts/Northrend/AzjolNerub/AzjolNerub/boss_hadronox.cpp

@@ -972,6 +972,8 @@ class spell_hadronox_periodic_summon_template_AuraScript : public AuraScript
             InstanceScript* instance = caster->GetInstanceScript();
             if (!instance)
                 return;
+            if (!instance->instance->HavePlayers())
+                return;
             if (instance->GetBossState(DATA_HADRONOX) == DONE)
                 GetAura()->Remove();
             else

src/server/scripts/Northrend/AzjolNerub/AzjolNerub/instance_azjol_nerub.cpp

@@ -72,9 +72,14 @@ class instance_azjol_nerub : public InstanceMapScript
             void OnUnitDeath(Unit* who) override
             {
                 InstanceScript::OnUnitDeath(who);
-                Creature* creature = who->ToCreature();
-                if (!creature || creature->IsCritter() || creature->IsControlledByPlayer())
+
+                if (who->GetTypeId() != TYPEID_UNIT || GetBossState(DATA_KRIKTHIR) == DONE)
                     return;
+
+                Creature* creature = who->ToCreature();
+                if (creature->IsCritter() || creature->IsCharmedOwnedByPlayerOrPlayer())
+                    return;
+
                 if (Creature* gatewatcher = GetCreature(DATA_KRIKTHIR))
                     gatewatcher->AI()->DoAction(-ACTION_GATEWATCHER_GREET);
             }