PVS-Studio warning V510 for WinMerge

std::wstring m_strLogPath;

void CLogFile::EnableLogging(BOOL bEnable)
{
  ...
  Write(_T("Path: %s\n*******\n"), m_strLogPath);
  ...
}

This is what should have been written here: m_strLogPath.c_str()

This suspicious code was found in WinMerge project by PVS-Studio static code analyzer.
Warning message is:
V510 The 'Write' function is not expected to receive class-type variable as second actual argument. Merge logfile.cpp 85

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/