PVS-Studio warning V584 for FAR

enum FINDASKDLGCOMBO
{
  FADC_ALLDISKS,
  ...
};

FindFiles::FindFiles()
{
  ...
  if (FADC_ALLDISKS+SearchMode==FADC_ALLDISKS ||
      FADC_ALLDISKS+SearchMode==FADC_ALLBUTNET)
  ...
}

A strange expression FADC_ALLDISKS+SearchMode==FADC_ALLDISKS can be simplified to SearchMode == 0.

This suspicious code was found in FAR project by PVS-Studio static code analyzer.
Warning message is:
V584 The 'FADC_ALLDISKS' value is present on both sides of the '==' operator. The expression is incorrect or it can be simplified. far findfile.cpp 3317

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/