PVS-Studio warning V530 for Synergy

typedef std::list<CIpcClientProxy*> CClientList;
CClientList      m_clients;

CIpcServer::~CIpcServer()
{
  ....
  m_clients.empty();
  ....
}

This suspicious code was found in Synergy project by PVS-Studio static code analyzer.
Warning message is:
V530 The return value of function 'empty' is required to be utilized. cipcserver.cpp 69

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/