Merge 3.4#2274

Merged

alalek merged 4 commits intoopencv:masterfrom

alalek:merge-3.4

Sep 25, 2019

Commits on Sep 23, 2019

Merge pull request #2269 from shaikmoeed:hotfix/samples-motempl-python-update

shaikmoeed
authored and
alalek
committed

Commits on Sep 24, 2019

backport: Fixed warnings produced by clang-9.0.0

mshabunin
authored and
alalek
committed
Merge pull request #2271 from alalek:build_cxx11_warnings
alalek
committed

Commits on Sep 25, 2019

Merge remote-tracking branch 'upstream/3.4' into merge-3.4
alalek
committed