fix(Core/Scripts): missing null checks for GetCharmerOrOwner and GetOwner (#24902)

src/server/game/AI/CoreAI/PetAI.cpp

@@ -746,10 +746,15 @@ bool PetAI::CanAttack(Unit* target, SpellInfo const* spellInfo)
 
         // Check if our owner selected this target and clicked "attack"
         Unit* ownerTarget = nullptr;
-        if (Player* owner = me->GetCharmerOrOwner()->ToPlayer())
+        Unit* charmerOrOwner = me->GetCharmerOrOwner();
+
+        if (charmerOrOwner)
+        {
+            if (Player* owner = charmerOrOwner->ToPlayer())
                 ownerTarget = owner->GetSelectedUnit();
             else
-            ownerTarget = me->GetCharmerOrOwner()->GetVictim();
+                ownerTarget = charmerOrOwner->GetVictim();
+        }
 
         if (ownerTarget && me->GetCharmInfo()->IsCommandAttack())
             return (target->GetGUID() == ownerTarget->GetGUID());

src/server/scripts/Spells/spell_generic.cpp

@@ -2559,7 +2559,7 @@ class spell_gen_vehicle_scaling_aura: public AuraScript
 
     bool Load() override
     {
-        return GetCaster() && GetCaster()->IsPlayer() && GetOwner()->IsCreature();
+        return GetCaster() && GetCaster()->IsPlayer() && GetOwner() && GetOwner()->IsCreature();
     }
 
     void CalculateAmount(AuraEffect const* /*aurEff*/, int32& amount, bool& /*canBeRecalculated*/)

src/server/scripts/World/npcs_special.cpp

@@ -2674,7 +2674,8 @@ struct npc_controller : public PossessedAI
     {
         if (!apply)
         {
-            me->GetCharmerOrOwner()->InterruptNonMeleeSpells(false);
+            if (Unit* charmerOrOwner = me->GetCharmerOrOwner())
+                charmerOrOwner->InterruptNonMeleeSpells(false);
         }
     }
 };