Bug 13871: [QA Follow-up] Fix small regression on AF with branchcode in Patron Info...

Bug 13871: [QA Follow-up] Fix small regression on AF with branchcode in Patron Info request

If you enable send_patron_home_library_in_af in your sip account, you
want a separate AF field for the home branch.

Test plan:
Send a 63 (Patron Info) and verify that you have an extra AF.

Signed-off-by: Marcel de Rooy <m.de.rooy@rijksmuseum.nl>
Tested Patron Status and Patron Info.

Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>
(cherry picked from commit c2ddc19600c70bcdc87cd64983c80073e19ac794)
Signed-off-by: Julian Maurice <julian.maurice@biblibre.com>