message: Fix NaN during first round issue in the iterative hash example.
diff: @@ -14,7 +14,7 @@ fn main() {
  let out = hasher.result();
  data = out.to_vec();
  - if i % 100000 == 0 {
  + if i != 0 && i % 100000 == 0 {
  let millis = now.elapsed().unwrap().as_millis();
  println!("{} rounds in last second", (i - round_count) as f64 / (millis - last_millis) as f64);
  last_millis = millis;
  