PVS-Studio warning V519 for WinMerge

String FileFilterHelper::ParseExtensions(
  const String &extensions) const
{
  ...
  strParsed = _T("^");
  strPattern = string_makelower(strPattern);
  strParsed = strPattern;
  ...
}

This suspicious code was found in WinMerge project by PVS-Studio static code analyzer.
Warning message is:
V519 The 'strParsed' variable is assigned values twice successively. Perhaps this is a mistake. Check lines: 339, 342. Merge filefilterhelper.cpp 342

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