Core/PacketIO: Fixed SMSG_LEVEL_UP_INFO structure

Port From (https://github.com/TrinityCore/TrinityCore/commit/b981606575ea8eb2ec473ce4c7db6e59dbb46b7b)

Source/Game/Entities/Player/Player.cs

@@ -5230,6 +5230,7 @@ namespace Game.Entities
             packet.PowerDelta[3] = 0;
             packet.PowerDelta[4] = 0;
             packet.PowerDelta[5] = 0;
+            packet.PowerDelta[6] = 0;
 
             for (Stats i = Stats.Strength; i < Stats.Max; ++i)
                 packet.StatDelta[(int)i] = info.stats[(int)i] - (int)GetCreateStat(i);

Source/Game/Networking/Packets/MiscPackets.cs

@@ -725,7 +725,7 @@ namespace Game.Networking.Packets
 
         public uint Level = 0;
         public uint HealthDelta = 0;
-        public int[] PowerDelta = new int[6];
+        public int[] PowerDelta = new int[(int)PowerType.MaxPerClass];
         public int[] StatDelta = new int[(int)Stats.Max];
         public int NumNewTalents;
         public int NumNewPvpTalentSlots;