75333e0ea5
This is related to #140381, where the symptom of the bug was a crash caused by an undefined behavior. In that case, setting a valid active viewer key was the proper fix. However, `find_active_context_recursive()` could return `nullptr` in theory so the same problem might occur in the future. The commit resolves the undefined behavior by avoiding the dereferencing of a null pointer. Pull Request: https://projects.blender.org/blender/blender/pulls/141270