editor: Fix panic when calculating jump data for buffer header (#42639)

Just on nightly.

Release Notes:

- N/A *or* Added/Fixed/Improved ...

Co-authored-by: Lukas Wirth <me@lukaswirth.dev>
b6972d70a5Smit Barmase committed on 11/13/2025, 3:48:05 PM· committed by GitHubparentec1664f
1 file changedLine totals unavailable