message: Objects must be 8 byte aligned
diff: @@ -23,8 +23,8 @@ struct Prepare_rep : public Message_rep
  View view;
  Seqno seqno;
  Digest digest;
  - int id; // id of the replica that generated the message.
  Digest hashed_nonce;
  + int id; // id of the replica that generated the message.
  #ifdef SIGN_BATCH
  size_t digest_sig_size;
  PbftSignature batch_digest_signature;
  