message: Fix after cherrypick.
diff: @@ -1159,13 +1159,12 @@ impl StorageInner {
  self.update_lowest_available_block_height(height)?;
  responder.respond(()).ignore()
  }
  - StorageRequest::GetAvailableBlockRange { responder } => {
  - responder.respond(self.get_available_block_range()).ignore()
  - }
  + StorageRequest::GetAvailableBlockRange { responder } => responder
  + .respond(self.get_available_block_range()?)
  + .ignore(),
  StorageRequest::GetLowestAvailableBlock { responder } => {
  - let mut txn = self.env.begin_ro_txn()?;
  let maybe_lowest_block =
  - self.get_block_by_height(&mut txn, self.lowest_available_block_height)?;
  + self.read_block_by_height(self.get_lowest_available_block_height()?)?;
  responder.respond(maybe_lowest_block).ignore()
  }
  StorageRequest::StoreFinalizedApprovals {
  @@ -1908,6 +1907,10 @@ impl StorageInner {
  }
  }
  + fn get_lowest_available_block_height(&self) -> Result<u64, FatalStorageError> {
  + Ok(self.indices.read()?.lowest_available_block_height)
  + }
  +
  fn update_lowest_available_block_height(
  &self,
  new_height: u64,
  