fix(Scripts/BlackwingLair): starting Razorgore the Untamed fight (#7783)

- Closes #7729

src/server/scripts/EasternKingdoms/BlackrockMountain/BlackwingLair/instance_blackwing_lair.cpp

@@ -71,11 +71,14 @@ public:
 
             switch (creature->GetEntry())
             {
+                case NPC_RAZORGORE:
+                    razorgoreGUID = creature->GetGUID();
+                    break;
                 case NPC_BLACKWING_DRAGON:
                 case NPC_BLACKWING_TASKMASTER:
                 case NPC_BLACKWING_LEGIONAIRE:
                 case NPC_BLACKWING_WARLOCK:
-                    if (Creature* razor = instance->GetCreature(GetGuidData(DATA_RAZORGORE_THE_UNTAMED)))
+                    if (Creature* razor = instance->GetCreature(razorgoreGUID))
                         if (CreatureAI* razorAI = razor->AI())
                             razorAI->JustSummoned(creature);
                     break;
@@ -207,7 +210,7 @@ public:
                     case SPECIAL:
                         if (++EggCount == 15)
                         {
-                            if (Creature* razor = instance->GetCreature(GetGuidData(DATA_RAZORGORE_THE_UNTAMED)))
+                            if (Creature* razor = instance->GetCreature(razorgoreGUID))
                             {
                                 SetData(DATA_EGG_EVENT, DONE);
                                 razor->RemoveAurasDueToSpell(42013); // MindControl
@@ -223,6 +226,19 @@ public:
             }
         }
 
+        ObjectGuid GetGuidData(uint32 type) const override
+        {
+            switch (type)
+            {
+                case DATA_RAZORGORE_THE_UNTAMED:
+                    return razorgoreGUID;
+                default:
+                    break;
+            }
+
+            return ObjectGuid::Empty;
+        }
+
         void OnUnitDeath(Unit* unit) override
         {
             //! HACK, needed because of buggy CreatureAI after charm
@@ -249,7 +265,7 @@ public:
                         break;
                     case EVENT_RAZOR_PHASE_TWO:
                         _events.CancelEvent(EVENT_RAZOR_SPAWN);
-                        if (Creature* razor = instance->GetCreature(GetGuidData(DATA_RAZORGORE_THE_UNTAMED)))
+                        if (Creature* razor = instance->GetCreature(razorgoreGUID))
                             razor->AI()->DoAction(ACTION_PHASE_TWO);
                         break;
                     case EVENT_RESPAWN_NEFARIUS:
@@ -270,6 +286,7 @@ public:
         EventMap _events;
 
         // Razorgore
+        ObjectGuid razorgoreGUID;
         uint8 EggCount;
         uint32 EggEvent;
         GuidList EggList;