Merge pull request #16414 from alalek:samples_fix_async
authorAlexander Alekhin <alexander.a.alekhin@gmail.com>
Fri, 24 Jan 2020 14:57:24 +0000 (14:57 +0000)
committerAlexander Alekhin <alexander.a.alekhin@gmail.com>
Fri, 24 Jan 2020 14:57:24 +0000 (14:57 +0000)

Trivial merge