fix types in two error printfs. one of these also had a %d bug no vararg for it, oops.
fix types in two error printfs. one of these also had a %d bug no vararg
for it, oops.

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