Core/BattlePets: Misc fixes

Port From (https://github.com/TrinityCore/TrinityCore/commit/11cc5c0d3bd46b5e68bb549625ef9ca7294deb21)

Source/Game/Networking/Packets/BattlePetPackets.cs

@@ -243,7 +243,7 @@ namespace Game.Networking.Packets
             data .WritePackedGuid( Guid);
             data.WriteUInt32(Species);
             data.WriteUInt32(CreatureID);
-            data.WriteUInt32(CollarID);
+            data.WriteUInt32(DisplayID);
             data.WriteUInt16(Breed);
             data.WriteUInt16(Level);
             data.WriteUInt16(Exp);
@@ -255,7 +255,7 @@ namespace Game.Networking.Packets
             data .WriteUInt8( Quality);
             data.WriteBits(Name.GetByteCount(), 7);
             data.WriteBit(OwnerInfo.HasValue); // HasOwnerInfo
-            data.WriteBit(Name.IsEmpty()); // NoRename
+            data.WriteBit(false); // NoRename
             data.FlushBits();
 
             data.WriteString(Name);
@@ -278,7 +278,7 @@ namespace Game.Networking.Packets
         public ObjectGuid Guid;
         public uint Species;
         public uint CreatureID;
-        public uint CollarID;
+        public uint DisplayID;
         public ushort Breed;
         public ushort Level;
         public ushort Exp;

Source/Game/Networking/Packets/SpellPackets.cs

@@ -744,9 +744,9 @@ namespace Game.Networking.Packets
         }
 
         public ObjectGuid Source;
-        public ObjectGuid Target; // Exclusive with TargetPosition
+        public ObjectGuid Target;
         public ObjectGuid Transport; // Used when Target = Empty && (SpellVisual::Flags & 0x400) == 0
-        public Vector3 TargetPosition; // Exclusive with Target
+        public Vector3 TargetPosition; // Overrides missile destination for SpellVisual::SpellVisualMissileSetID
         public uint SpellVisualID;
         public float TravelSpeed;
         public ushort HitReason;