Core/GameObject: Store unit in GameObject::SetLootState - required for trap activation.

src/server/game/Entities/GameObject/GameObject.cpp

@@ -2015,6 +2015,7 @@ void GameObject::SetDestructibleState(GameObjectDestructibleState state, Player*
 void GameObject::SetLootState(LootState state, Unit* unit)
 {
     m_lootState = state;
+    m_lootStateUnit = unit;
     AI()->OnStateChanged(state, unit);
     sScriptMgr->OnGameObjectLootStateChanged(this, state, unit);
     if (m_model)

src/server/game/Entities/GameObject/GameObject.h

@@ -841,6 +841,7 @@ class GameObject : public WorldObject, public GridObject<GameObject>, public Map
         time_t      m_respawnTime;                          // (secs) time of next respawn (or despawn if GO have owner()),
         uint32      m_respawnDelayTime;                     // (secs) if 0 then current GO state no dependent from timer
         LootState   m_lootState;
+        Unit*       m_lootStateUnit;
         bool        m_spawnedByDefault;
         time_t      m_cooldownTime;                         // used as internal reaction delay time store (not state change reaction).
                                                             // For traps this: spell casting cooldown, for doors/buttons: reset time.