PVS-Studio warning V568 for OpenCV

CAPDRIVERCAPS caps;

bool CvCaptureCAM_VFW::open( int wIndex )
{
  ....
  memset( &caps, 0, sizeof(caps));
  capDriverGetCaps( hWndC, &caps, sizeof(&caps));
  ....
}

This suspicious code was found in OpenCV project by PVS-Studio static code analyzer.
Warning message is:
V568 It's odd that the argument of sizeof() operator is the '& caps' expression. cap_vfw.cpp 409

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/