message: Fix selfencrypt
diff: @@ -71,7 +71,7 @@ impl SelfEncrypt {
  // opaque aead_encrypted(plaintext)[length as expanded];
  // };
  // AAD covers the entire header, plus the value of the AAD parameter that is provided.
  - let salt = random(Self::SALT_LENGTH)?;
  + let salt = random(Self::SALT_LENGTH);
  let aead = self.make_aead(&self.key, &salt)?;
  let encoded_len = 2 + salt.len() + plaintext.len() + aead.expansion();
  