cmake HAVE_MSMF examples

chsl/PLADE code/3rd_party/opencv/cmake/OpenCVFindLibsVideo.cmake :228 

check_include_file(Mfapi.h HAVE_MSMF)

plumonito/dtslam 3rdparty/opencv-git/cmake/OpenCVFindLibsVideo.cmake :259 

check_include_file(Mfapi.h HAVE_MSMF)