The special case ChangeClearSize(Selected, 0mm) is broken when used to change a via's solder mask clearance.

It does work as expected for pins.
A patch is found attached which makes the idiomatic sequence to easily provide the minimum solder mask clearance work again:

- selecting all pins and vias
- ChangeClearSize(Selected, 0mm)
- ChangeClearSize(Selected, +0.15mm)

Signed-off-by: Bert Timmerman <bert.timmerman@xs4all.nl>