Fixes/cleanups from b026ee7ef8, And misc fixes/crashes.

Source/Game/Entities/AreaTrigger/AreaTriggerTemplate.cs

@@ -300,7 +300,7 @@ namespace Game.Entities
         public uint MorphCurveId;
         public uint FacingCurveId;
 
-        public uint AnimId;
+        public int AnimId;
         public uint AnimKitId;
 
         public uint DecalPropertiesId;

Source/Game/Entities/Object/Update/UpdateFields.cs

@@ -5437,25 +5437,62 @@ namespace Game.Entities
     public class VisualAnim : BaseUpdateData<AreaTrigger>
     {
         public UpdateField<bool> Field_C = new(0, 1);
-        public UpdateField<uint> AnimationDataID = new(0, 2);
+        public UpdateField<int> AnimationDataID = new(0, 2);
         public UpdateField<uint> AnimKitID = new(0, 3);
         public UpdateField<uint> AnimProgress = new(0, 4);
 
         public VisualAnim() : base(0, TypeId.AreaTrigger, 5) { }
 
-        void WriteCreate(WorldPacket data, AreaTrigger owner, Player receiver)
+        public void WriteCreate(WorldPacket data, AreaTrigger owner, Player receiver)
         {
-
+            data.WriteInt32(AnimationDataID);
+            data.WriteUInt32(AnimKitID);
+            data.WriteUInt32(AnimProgress);
+            data.WriteBit(Field_C);
+            data.FlushBits();
         }
 
-        void WriteUpdate(WorldPacket data, bool ignoreChangesMask, AreaTrigger owner, Player receiver)
+        public void WriteUpdate(WorldPacket data, bool ignoreChangesMask, AreaTrigger owner, Player receiver)
         {
+            UpdateMask changesMask = _changesMask;
+            if (ignoreChangesMask)
+                changesMask.SetAll();
 
+            data.WriteBits(changesMask.GetBlock(0), 5);
+
+            if (changesMask[0])
+            {
+                if (changesMask[1])
+                {
+                    data.WriteBit(Field_C);
+                }
+            }
+            data.FlushBits();
+            if (changesMask[0])
+            {
+                if (changesMask[2])
+                {
+                    data.WriteInt32(AnimationDataID);
+                }
+                if (changesMask[3])
+                {
+                    data.WriteUInt32(AnimKitID);
+                }
+                if (changesMask[4])
+                {
+                    data.WriteUInt32(AnimProgress);
+                }
+            }
+            data.FlushBits();
         }
 
         public override void ClearChangesMask()
         {
-
+            ClearChangesMask(Field_C);
+            ClearChangesMask(AnimationDataID);
+            ClearChangesMask(AnimKitID);
+            ClearChangesMask(AnimProgress);
+            _changesMask.ResetAll();
         }
     }
 

Source/Game/Entities/Player/Player.cs

@@ -4572,7 +4572,7 @@ namespace Game.Entities
 
         public bool HasCorpse()
         {
-            return _corpseLocation.GetMapId() != 0xFFFFFFFF;
+            return _corpseLocation != null && _corpseLocation.GetMapId() != 0xFFFFFFFF;
         }
         public WorldLocation GetCorpseLocation() { return _corpseLocation; }