message: refactor: Use only one temporary buffer in CreateObfuscateKey
diff: @@ -220,10 +220,9 @@ const unsigned int CDBWrapper::OBFUSCATE_KEY_NUM_BYTES = 8;
  */
  std::vector<unsigned char> CDBWrapper::CreateObfuscateKey() const
  {
  - unsigned char buff[OBFUSCATE_KEY_NUM_BYTES];
  - GetRandBytes(buff, OBFUSCATE_KEY_NUM_BYTES);
  - return std::vector<unsigned char>(&buff[0], &buff[OBFUSCATE_KEY_NUM_BYTES]);
  -
  + std::vector<uint8_t> ret(OBFUSCATE_KEY_NUM_BYTES);
  + GetRandBytes(ret.data(), OBFUSCATE_KEY_NUM_BYTES);
  + return ret;
  }
  bool CDBWrapper::IsEmpty()
  