message: In validate_filters(), check filter availability
diff: @@ -517,6 +517,8 @@ pub(crate) fn validate_filters(filters: &[Filter], type_class: H5T_class_t) -> R
  let mut comp_filter: Option<&Filter> = None;
  for filter in filters {
  + ensure!(filter.is_available(), "Filter not available: {:?}", filter);
  +
  let id = filter.id();
  if let Some(f) = map.get(&id) {
  