message: Use better syntax for bitfield
diff: @@ -63,7 +63,7 @@ public:
  template<typename Stream>
  void Serialize(Stream &s) const {
  assert(!IsSpent());
  - uint32_t code = nHeight * 4 + (fCoinBase ? 1 : 0) + (fCoinStake ? 2 : 0);
  + uint32_t code = (nHeight << 2) + (fCoinBase ? 1 : 0) + (fCoinStake ? 2 : 0);
  ::Serialize(s, VARINT(code));
  ::Serialize(s, CTxOutCompressor(REF(out)));
  }
  