Fix comparison between signed and unsigned integer.  Makes the random panics during autoconf disappear on the v215.
Fix comparison between signed and unsigned integer.  Makes the random
panics during autoconf disappear on the v215.

ok dlg@, otto@

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