added NPC Relay to script, stop prince Error.

src/scripts/EasternKingdoms/Karazhan/boss_prince_malchezaar.cpp

@@ -212,6 +212,7 @@ public:
         void Reset() override
         {
             Initialize();
+            
         }
 
         void KilledUnit(Unit* /*victim*/) override

src/scripts/EasternKingdoms/Karazhan/instance_karazhan.cpp

@@ -47,6 +47,8 @@ public:
                 break;
             case NPC_NIGHTBANE:
                 m_uiNightBaneGUID = creature->GetGUID();
+            case NPC_RELAY:
+                m_uiRelayGUID = creature->GetGUID();
             }
         }
 
@@ -302,6 +304,7 @@ public:
         uint64 MastersTerraceDoor[2];
         uint64 ImageGUID;
         uint64 DustCoveredChest;
+        uint64 m_uiRelayGUID;
     };
 };
 

src/scripts/EasternKingdoms/Karazhan/karazhan.h

@@ -87,7 +87,8 @@ enum KZMiscCreatures
     NPC_PHASE_HOUND = 16178,
     NPC_DREADBEAST = 16177,
     NPC_SHADOWBEAST = 16176,
-    NPC_KILREK = 17229
+    NPC_KILREK = 17229,
+    NPC_RELAY = 17645
 };
 
 enum KZGameObjectIds