message: fix: avoid overflowing on abs() if latency is MIN
diff: @@ -213,7 +213,7 @@ impl State {
  .handshaked_iter()
  .filter_map(|(_, peer)| peer.current_head.as_ref())
  .map(|current_head| (current_head_timestamp - current_head.header.timestamp()).i64())
  - .filter(|latency: &i64| latency.abs() < SYNC_LATENCY)
  + .filter(|latency: &i64| latency.saturating_abs() < SYNC_LATENCY)
  .count();
  bootstrapped_peers_len >= self.config.peers_bootstrapped_min
  