message: add nTime to signatures
diff: @@ -1135,6 +1135,8 @@ public:
  void Serialize(S &s) const {
  // Serialize nVersion
  ::Serialize(s, txTo.nVersion);
  + // Serialize nTime
  + ::Serialize(s, txTo.nTime);
  // Serialize vin
  unsigned int nInputs = fAnyoneCanPay ? 1 : txTo.vin.size();
  ::WriteCompactSize(s, nInputs);
  @@ -1217,6 +1219,8 @@ uint256 SignatureHash(const CScript& scriptCode, const CTransaction& txTo, unsig
  CHashWriter ss(SER_GETHASH, 0);
  // Version
  ss << txTo.nVersion;
  + // nTime
  + ss << txTo.nTime;
  // Input prevouts/nSequence (none/all, depending on flags)
  ss << hashPrevouts;
  ss << hashSequence;
  