Fixed hf field blurb values after changes from change 5166

Change-Id: I1c32fb3629c714d72b5398ad82d219d8786980a1
Reviewed-on: https://code.wireshark.org/review/5171
Reviewed-by: Graham Bloice <graham.bloice@trihedral.com>
Petri-Dish: Graham Bloice <graham.bloice@trihedral.com>
Tested-by: Petri Dish Buildbot <buildbot-no-reply@wireshark.org>
Reviewed-by: Anders Broman <a.broman58@gmail.com>