In `sequencer_check_scene_recursion`, `seq->scene` can be null which leads to crashes, thus guard against that. Pull Request: https://projects.blender.org/blender/blender/pulls/124536
In `sequencer_check_scene_recursion`, `seq->scene` can be null which leads to crashes, thus guard against that. Pull Request: https://projects.blender.org/blender/blender/pulls/124536