trust: Correctly handle persisting OIDs with zero length
trust: Correctly handle persisting OIDs with zero length

Distrotech/p11-kit,Distrotech/p11-kit,freedesktop-unofficial-mirror/p11-glue__p11-kit,pspacek/p11-kit,lkundrak/p11-kit,lkundrak/p11-kit,pspacek/p11-kit,freedesktop-unofficial-mirror/p11-glue__p11-kit,pspacek/p11-kit,pspacek/p11-kit,Distrotech/p11-kit,Distrotech/p11-kit,freedesktop-unofficial-mirror/p11-glue__p11-kit,lkundrak/p11-kit