A couple of missing letoh32() conversions of GPT header fields in gpt_chk_hdr() and gpt_chk_parts().
A couple of missing letoh32() conversions of GPT header fields in
gpt_chk_hdr() and gpt_chk_parts().

Spotted when investigating zeloff's GPT bug report.

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