message: Fix a warning
  Reported by s7r
diff: @@ -888,13 +888,13 @@ void CClient::AddBuffer(const T& Message) {
  }
  void CClient::EchoMessage(const CMessage& Message) {
  + CMessage EchoedMessage = Message;
  for (CClient* pClient : GetClients()) {
  if (pClient->HasEchoMessage() ||
  (pClient != this && (m_pNetwork->IsChan(Message.GetParam(0)) ||
  pClient->HasSelfMessage()))) {
  - CMessage EchoMessage(Message);
  - EchoMessage.SetNick(GetNickMask());
  - pClient->PutClient(EchoMessage);
  + EchoedMessage.SetNick(GetNickMask());
  + pClient->PutClient(EchoedMessage);
  }
  }
  }
  