https://github.com/opencv/opencv_contrib/issues/1578

[danopdev]

resolves #1578

It's not THE SOLUTION because it does not fix the root cause (I don't know the algorithm) but it's a WORKAROUND to fix indexes out of bounds.
Using this changed I was able to do the inpaint (SHIFTMAP) on the example files.

Pull Request Readiness Checklist

See details at https://github.com/opencv/opencv/wiki/How_to_contribute#making-a-good-pull-request

• [ x ] I agree to contribute to the project under Apache 2 License.
• [ x ] To the best of my knowledge, the proposed patch is not based on a code under GPL or other license that is incompatible with OpenCV
• [ x ] The PR is proposed to proper branch
• [ x ] There is reference to original bug report and related work
• [ x ] There is accuracy test, performance test and test data in opencv_extra repository, if applicable
  Patch to opencv_extra has the same branch name.
• [ x ] The feature is well documented and sample code can be built with the project CMake

[danopdev]

My bad. Fix tailing spaces.

[alalek]

LGTM 👍