1.3 - grid settings - freezes if spacing lower than sub-divisions

[user0]

XnView: MP 1.3.0 64bits (Sep 6 2022)
OS: Windows 64bit (21H1), display resolution 3840x2160, win scaling 150%

Grid Settings dialog.
XnViewMP freezes when settings Spacing lower than Sub-Divisions.
Also Sub-divisions does not apply its settings until checkbox unticked and ticked again.

To reproduce:
1. run clean portable XnViewMP
2. open Grid Settings dialog: View menu -> Grid settings...
3. set Spacing to 4
4. tick Sub-divisions checkbox (default value 5)

Actual behaviour:
Program freezes.

Expected behaviour:
option 1 - does not allow user to set/paste value that will lead to error.
option 2 - show warning message "Spacing cannot be lower than Sub-divisions" and revert value to the safe one.

[xnview]

known issue