message: refactor: Avoid duplicate map lookup in ScriptToAsmStr
diff: @@ -111,8 +111,9 @@ std::string ScriptToAsmStr(const CScript& script, const bool fAttemptSighashDeco
  // checks in CheckSignatureEncoding.
  if (CheckSignatureEncoding(vch, SCRIPT_VERIFY_STRICTENC, nullptr)) {
  const unsigned char chSigHashType = vch.back();
  - if (mapSigHashTypes.count(chSigHashType)) {
  - strSigHashDecode = "[" + mapSigHashTypes.find(chSigHashType)->second + "]";
  + const auto it = mapSigHashTypes.find(chSigHashType);
  + if (it != mapSigHashTypes.end()) {
  + strSigHashDecode = "[" + it->second + "]";
  vch.pop_back(); // remove the sighash type byte. it will be replaced by the decode.
  }
  }
  