message: Fix compile errors after latest cesium-native changes.
diff: @@ -29,7 +29,7 @@ struct GenericValueToString {
  FString operator()(const CesiumGltf::MetadataArrayView<T>& value) {
  FString result = "{";
  FString seperator = "";
  - for (size_t i = 0; i < value.size(); ++i) {
  + for (int64_t i = 0; i < value.size(); ++i) {
  result += seperator + (*this)(value[i]);
  seperator = ", ";
  }
  @@ -401,9 +401,9 @@ FCesiumMetadataFeatureTable::FCesiumMetadataFeatureTable(
  featureTableView.forEachProperty([&properties = _properties](
  const std::string& propertyName,
  auto propertyValue) mutable {
  - if (propertyValue) {
  + if (propertyValue.status() == MetadataPropertyViewStatus::Valid) {
  FString key(propertyName.size(), propertyName.data());
  - properties.Add(key, FCesiumMetadataProperty(*propertyValue));
  + properties.Add(key, FCesiumMetadataProperty(propertyValue));
  }
  });
  }
  