fix(Core/Dungeon): Remove Goblin Rocket Pack from inventory in ICC Gunship Battle (#2191)

Part 2

src/server/scripts/Northrend/IcecrownCitadel/boss_icecrown_gunship_battle.cpp

@@ -168,7 +168,6 @@ enum Spells
 
 enum MiscData
 {
-    ITEM_GOBLIN_ROCKET_PACK = 49278,
     MUSIC_ENCOUNTER         = 17289
 };
 
@@ -646,13 +645,6 @@ class npc_gunship : public CreatureScript
                                         c->DespawnOrUnsummon(1);
                                 }
                             }
-                            
-                    // Destory Goblin Rocket Pack
-                    Map::PlayerList const &PlayerList = me->GetMap()->GetPlayers();
-                    if (!PlayerList.isEmpty())
-                        for (Map::PlayerList::const_iterator itr = PlayerList.begin(); itr != PlayerList.end(); ++itr)
-                            if (Player* pPlr = itr->GetSource())
-                                pPlr->DestroyItemCount(49278, 1, true);
                 }
                 else
                 {

src/server/scripts/Northrend/IcecrownCitadel/icecrown_citadel.h

@@ -562,6 +562,11 @@ enum AreaIds
     AREA_THE_FROZEN_THRONE  = 4859,
 };
 
+enum ItemIds
+{
+    ITEM_GOBLIN_ROCKET_PACK = 49278
+};
+
 class spell_trigger_spell_from_caster : public SpellScriptLoader
 {
     public:

src/server/scripts/Northrend/IcecrownCitadel/instance_icecrown_citadel.cpp

@@ -1028,6 +1028,13 @@ class instance_icecrown_citadel : public InstanceMapScript
                         theLichKing->SetVisible(false);
             }
             
+            void RemoveBackPack()
+            {
+                for (auto const& itr : instance->GetPlayers())
+                    if (Player* _player = itr.GetSource())
+                        _player->DestroyItemCount(ITEM_GOBLIN_ROCKET_PACK, _player->GetItemCount(ITEM_GOBLIN_ROCKET_PACK), true);
+            }
+
             bool SetBossState(uint32 type, EncounterState state)
             {
                 if (!InstanceScript::SetBossState(type, state))
@@ -1742,6 +1749,8 @@ class instance_icecrown_citadel : public InstanceMapScript
                             {
                                 transport->setActive(false);
                                 transport->EnableMovement(false);
+                                //After movement is stopped remove the backpack
+                                RemoveBackPack();
                             }
                         if (Creature* captain = source->FindNearestCreature(TeamIdInInstance == TEAM_HORDE ? NPC_IGB_HIGH_OVERLORD_SAURFANG : NPC_IGB_MURADIN_BRONZEBEARD, 200.0f))
                             captain->AI()->DoAction(ACTION_EXIT_SHIP);