PVS-Studio warning V530 for amtsdk

void CimClassContainer::Clear()
{
  for(unsigned int i = 0; i < vec.size(); i++)
  {
    delete vec[i];
    vec[i] = NULL;
  }
  vec.empty();
}

This is what should have been written here: vec.clear();

This suspicious code was found in amtsdk project by PVS-Studio static code analyzer.
Warning message is:
V530 The return value of function 'empty' is required to be utilized. EventLogReader cimclass.h 153

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