ei: fix ei_seat_unbind_capabilities
Simplify the code a little but more importantly: if we get down to zero capabilities close the devices - just like we do in ei_seat_unbind_capability.
Due to an influx of spam, we have had to impose restrictions on new accounts. Please see this wiki page for instructions on how to get full permissions. Sorry for the inconvenience.
Simplify the code a little but more importantly: if we get down to zero capabilities close the devices - just like we do in ei_seat_unbind_capability.