Scripts/VioletHold: fix stack overflow when reflecting 'Splash'

Closes #19514

(cherry picked from commit d9a1c82ab44254c280083e6297b8aec6350ab363)

src/server/scripts/Northrend/VioletHold/boss_ichoron.cpp

@@ -243,7 +243,7 @@ class npc_ichor_globule : public CreatureScript
 
         struct npc_ichor_globuleAI : public ScriptedAI
         {
-            npc_ichor_globuleAI(Creature* creature) : ScriptedAI(creature)
+            npc_ichor_globuleAI(Creature* creature) : ScriptedAI(creature), _splashTriggered(false)
             {
                 _instance = creature->GetInstanceScript();
                 creature->SetReactState(REACT_PASSIVE);
@@ -275,14 +275,21 @@ class npc_ichor_globule : public CreatureScript
             // this feature should be still implemented
             void DamageTaken(Unit* /*attacker*/, uint32& damage) override
             {
+                if (_splashTriggered)
+                    return;
+
                 if (damage >= me->GetHealth())
+                {
+                    _splashTriggered = true;
                     DoCastAOE(SPELL_SPLASH);
+                }
             }
 
             void UpdateAI(uint32 /*diff*/) override { }
 
         private:
             InstanceScript* _instance;
+            bool _splashTriggered;
         };
 
         CreatureAI* GetAI(Creature* creature) const override