Thank you for catching this!

This patch should go into 3.4 branch first.
We will merge changes from 3.4 into master regularly (weekly/bi-weekly).

So, please:

• change "base" branch of this PR: master => 3.4 (use "Edit" button near PR title)
• rebase your commits from master onto 3.4 branch. For example:
  git rebase -i --onto upstream/3.4 upstream/master
  (check list of your commits, save and quit (Esc + "wq" + Enter)
  where upstream is configured by following this GitHub guide and fetched (git fetch upstream).
• push rebased commits into source branch of your fork (with --force option)

Note: no needs to re-open PR, apply changes "inplace".

done i guess.

Looks like rebase goes wrong... Try the following:

git checkout patch-1 -B patch-1-backup

git fetch https://github.com/opencv/opencv 3.4:3.4
git checkout 3.4 -B patch-1
git cherry-pick 9b9aa3d
git push -f origin patch-1:patch-1

git branch -D patch-1-backup

:D

without this patch i wonder what would be