PVS-Studio warning V512 for DDKSamples

HRESULT
CDot11SampleExtUI::CreateSecurityProperties(....)
{
  ....
  WCHAR wbuf[128];
  ....
  ZeroMemory(wbuf, 128);
  ....
}

This suspicious code was found in DDKSamples project by PVS-Studio static code analyzer.
Warning message is:
V512 A call of the 'memset' function will lead to underflow of the buffer 'wbuf'. ihvsampleextui.cpp 288

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/