message: net_sync(): Fix initial sync from the genesis block
diff: @@ -67,8 +67,8 @@ pub fn net_sync(net: &mut Api, net_cfg: &net::Config, storage: storage::Storage)
  // If our tip is in an epoch that has become stable, we now need
  // to pack it. So read the previously fetched blocks in this epoch
  // and prepend them to the incoming blocks.
  - if our_tip.0.date.get_epochid() < first_unstable_epoch {
  -
  + if our_tip.0.date.get_epochid() < first_unstable_epoch && our_tip != genesis_ref
  + {
  let epoch_id = our_tip.0.date.get_epochid();
  let mut writer = storage::pack::PackWriter::init(&storage.config);
  let epoch_time_start = SystemTime::now();
  