Invariant violated in TextViews.AdjustLines

## Steps to reproduce

1. Write `openbsd` in Log.
2. Select it (double-click with mouse).
3. Call menu `Info` → `Search In Sources`.
4. Click on `Comm/Mod/TCP.odc`.
5. Scroll down with the mouse.

## Expected result

Normal scrolling without errors.

## Actual result

Invariant violation occurs in `TextViews.AdjustLines` at:

```
ASSERT(t0.next.start = org, 100)
```
