message: redjubjub: make PrivateKey internal scalar public
diff: @@ -34,7 +34,7 @@ pub struct Signature {
  sbar: [u8; 32],
  }
  -pub struct PrivateKey<E: JubjubEngine>(E::Fs);
  +pub struct PrivateKey<E: JubjubEngine>(pub E::Fs);
  pub struct PublicKey<E: JubjubEngine>(pub Point<E, Unknown>);
  