error when AutoDrive chasing combine.

[jtsage]

I can do a pull request on this later, but it's one letter, figured an issue might just be less work.

Line 1646:

FS22_VehicleExplorer/VehicleSort.lua

Line 1646 in 1401c51

if veh.ad.stateModule.currentDestination ~= ni and (veh.ad.stateModule.currentDestination.id == veh.ad.stateModule.firstMarker.id) then

ni vs nil

When chasing the combine, you get this instead: