PVS-Studio warning V547 for QT

const TCHAR* getQueryName() const;

Query* MultiFieldQueryParser::parse(....)
{
  ...
  if (q && (q->getQueryName() != _T("BooleanQuery")
  ...
}

This suspicious code was found in QT project by PVS-Studio static code analyzer.
Warning message is:
V547 Expression 'q->getQueryName () != L"BooleanQuery"' is always true. To compare strings you should use wcscmp() function. QtCLucene multifieldqueryparser.cpp 44

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