message: Update ProRegTx serialization order
  Makes consistent with both and the order above
diff: @@ -48,8 +48,8 @@ public:
  READWRITE(keyIDOwner);
  READWRITE(pubKeyOperator);
  READWRITE(keyIDVoting);
  - READWRITE(*(CScriptBase*)(&scriptPayout));
  READWRITE(nOperatorReward);
  + READWRITE(*(CScriptBase*)(&scriptPayout));
  READWRITE(inputsHash);
  if (!(s.GetType() & SER_GETHASH)) {
  READWRITE(vchSig);
  