PVS-Studio warning V512 for DeSmuME

mapview_struct *MapView = NULL;

BOOL CALLBACK ViewMapsProc (HWND hwnd, UINT message,
                            WPARAM wParam, LPARAM lParam)
{
  ...
  MapView = new mapview_struct;
  memset(MapView, 0, sizeof(MapView));
  ...
}

This is what should have been written here:
memset(MapView, 0, sizeof(*MapView));

This suspicious code was found in DeSmuME project by PVS-Studio static code analyzer.
Warning message is:
V512 A call of the 'memset' function will lead to underflow of the buffer 'MapView'. DeSmuME_VS2005 mapview.cpp 204

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/