Merge pull request #26022 from Kumataro:fix26016

Imgproc: use double to determine whether the corners points are within src #26022

close #26016
Related https://github.com/opencv/opencv_contrib/pull/3778

### 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 another license that is incompatible with OpenCV
- [x] The PR is proposed to the proper branch
- [x] There is a reference to the 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

modules/features2d/src/keypoint.cpp

@@ -96,7 +96,9 @@ struct RoiPredicate
 
     bool operator()( const KeyPoint& keyPt ) const
     {
-        return !r.contains( keyPt.pt );
+        // workaround for https://github.com/opencv/opencv/issues/26016
+        // To keep its behaviour, keyPt.pt casts to Point_<int>.
+        return !r.contains( Point_<int>(keyPt.pt) );
     }
 
     Rect r;