vim: Fix empty selections panic in `insert_at_previous` (#42504)

Fixes ZED-15C

Release Notes:

- N/A *or* Added/Fixed/Improved ...
78f466559aLukas Wirth committed on 11/12/2025, 9:54:22 AM· committed by GitHubparent4f158c1
1 file changedLine totals unavailable