Merge pull request #12020 from alalek:videoio_backends_query_api
authorAlexander Alekhin <alexander.a.alekhin@gmail.com>
Tue, 24 Jul 2018 19:43:49 +0000 (19:43 +0000)
committerAlexander Alekhin <alexander.a.alekhin@gmail.com>
Tue, 24 Jul 2018 19:43:49 +0000 (19:43 +0000)

Trivial merge