message: Fix mn listen issue
diff: @@ -1025,9 +1025,6 @@ bool AppInit2()
  // Check level must be 4 for zerocoin checks
  if (mapArgs.count("-checklevel"))
  return UIError(_("Error: Unsupported argument -checklevel found. Checklevel must be level 4."));
  - // Exit early if -masternode=1 and -listen=0
  - if (GetBoolArg("-masternode", DEFAULT_MASTERNODE) && !GetBoolArg("-listen", DEFAULT_LISTEN))
  - return UIError(_("Error: -listen must be true if -masternode is set."));
  // Exit early if -masternode=1 and -port is not the default port
  if (GetBoolArg("-masternode", DEFAULT_MASTERNODE) && GetListenPort() != Params().GetDefaultPort())
  return UIError(strprintf(_("Error: Invalid port %d for running a masternode."), GetListenPort()) + "\n\n" +
  