Scripts/Spells: fix Seaforium Blast script crash

Closes #21663

1 files changed, 3 insertions, 5 deletions

diff --git a/src/server/scripts/Spells/spell_generic.cpp b/src/server/scripts/Spells/spell_generic.cpp
index dbf7d7da256..94632eb9171 100644
--- a/src/server/scripts/Spells/spell_generic.cpp
+++ b/src/server/scripts/Spells/spell_generic.cpp
@@ -2916,17 +2916,15 @@ class spell_gen_seaforium_blast : public SpellScript
 
     bool Load() override
     {
-        // OriginalCaster is always available in Spell::prepare
-        return GetOriginalCaster()->GetTypeId() == TYPEID_PLAYER;
+        return GetGObjCaster()->GetOwnerGUID().IsPlayer();
     }
 
     void AchievementCredit(SpellEffIndex /*effIndex*/)
     {
-        // but in effect handling OriginalCaster can become nullptr
-        if (Unit* originalCaster = GetOriginalCaster())
+        if (Unit* owner = GetGObjCaster()->GetOwner())
             if (GameObject* go = GetHitGObj())
                 if (go->GetGOInfo()->type == GAMEOBJECT_TYPE_DESTRUCTIBLE_BUILDING)
-                    originalCaster->CastSpell(originalCaster, SPELL_PLANT_CHARGES_CREDIT_ACHIEVEMENT, true);
+                    owner->CastSpell(nullptr, SPELL_PLANT_CHARGES_CREDIT_ACHIEVEMENT, true);
     }
 
     void Register() override