message: Fix Reset impl
diff: @@ -40,7 +40,7 @@ impl FixedOutputDirty for Sha256 {
  impl Reset for Sha256 {
  fn reset(&mut self) {
  - Self::default();
  + *self = Self::default();
  }
  }
  @@ -75,6 +75,6 @@ impl FixedOutputDirty for Sha224 {
  impl Reset for Sha224 {
  fn reset(&mut self) {
  - Self::default();
  + *self = Self::default();
  }
  }
  