Get size of the struct cardslot_event, not the function cardslot_event.
Get size of the struct cardslot_event, not the function cardslot_event.

Found by pcc.

OK deraadt.

orumin/openbsd-efivars,orumin/openbsd-efivars,orumin/openbsd-efivars,orumin/openbsd-efivars