Marks are not displayed with -J if mark is not at the start of a line

Steps to reproduce:
1. Run ```seq 100 | tr '\n' ' ' | LESSNOCONFIG=- less -J```
2. Type ```ma```. Observe that the status column shows the ```a``` mark.
3. Quit less and re-run the command.
4. Type ```J``` to scroll one line.
5. Type ```ma```.

Expected result:
The status column should show the ```a``` mark.

Actual result:
The status column remains blank.