Fix GLTF Images which do not reference the buffer views list correctly.

ReFuel.Gltf/GltfImage.cs

@@ -7,7 +7,7 @@ namespace ReFuel.Gltf
 {
     public class GltfImage : GltfIdObject
     {
-        private GltfSmartId<GltfBufferView> _bufferView = new GltfSmartId<GltfBufferView>();
+        private GltfSmartId<GltfBufferView> _bufferView;
         public override GltfObjectKind Kind => GltfObjectKind.Image;
 
         public string? Name { get; set; }
@@ -32,6 +32,7 @@ namespace ReFuel.Gltf
 
         internal GltfImage(GltfDocument document) : base(document)
         {
+            _bufferView = new GltfSmartId<GltfBufferView>(document.BufferViews);
         }
 
         public Stream Open(string? pwd = null, IGltfStreamProvider? provider = null)