Doh, fix a memory leak when an invalid file descriptor is passed to a *at(2) function.
Doh, fix a memory leak when an invalid file descriptor is passed to a
*at(2) function.

ok guenther@, thib@

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