Merge pull request #7866 from alalek:update_waitKey
authorVadim Pisarevsky <vadim.pisarevsky@gmail.com>
Fri, 16 Dec 2016 12:25:11 +0000 (12:25 +0000)
committerVadim Pisarevsky <vadim.pisarevsky@gmail.com>
Fri, 16 Dec 2016 12:25:11 +0000 (12:25 +0000)

Trivial merge