pack: Fix number of bytes
pack: Fix number of bytes

howeyc/restic,middelink/restic,jayme-github/restic,restic/restic,kurin/restic,byo/restic,intfrr/restic,bchapuis/restic,jayme-github/restic,arithmetric/restic,byo/restic,middelink/restic,kurin/restic,episource/restic,fawick/restic,klauspost/restic,mappu/restic,ckemper67/restic,stuertz/restic,ar-jan/restic,restic/restic,stuertz/restic,fawick/restic,ar-jan/restic,pombredanne/restic