New global - the type of building being linked to a lever/pressure plate

[pronvit]

I seem to have found a new global, it's a one byte value immediately following ui_workshop_in_add and specifies the type of building being linked to a lever/pressure plate. Interesting thing is that it takes not values from building_type, but character code of a key you use to initiate linkage, e.g. b for bridge, ... , T for track stop. It's set to 0xff when not in the linkage mode.

EDIT: Also it's set to t when choosing a mechanism for the target, and to l when choosing a mechanism for the lever/pressure plate (with ui_building_assign_items holding the list of choices).

Since globals need to be updated manually for new DF versions, what's the procedure of adding a new one?

[lethosor]

This seems like it should be fairly easy to locate with find-offsets, once a scan is implemented for it.
(@quietust says he identified this in 0.23, by the way, so it could be using character codes because of its age.)

[lethosor]

I've gotten a scan for this in find-offsets to mostly work.