PVS-Studio warning V622 for KDE4

void ListJob::doStart()
{
  Q_D( ListJob );

  switch ( d->option ) {
    break;                          //<==
  case IncludeUnsubscribed:
    d->command = "LIST";
    break;
  case IncludeFolderRoleFlags:
    d->command = "XLIST";
    break;
  case NoOption:
  default:
    d->command = "LSUB";
  }
  ....
}

This suspicious code was found in KDE4 project by PVS-Studio static code analyzer.
Warning message is:
V622 Consider inspecting the 'switch' statement. It's possible that the first 'case' operator is missing. listjob.cpp 131

PVS-Studio is a static analyzer for detecting bugs in the source code of applications written in C, C++, C++11, C++/CX. Site: http://www.viva64.com/en/pvs-studio/