Bug 24350: Fix Branches.pickup_locations

Bug 24350: Fix Branches.pickup_locations

This will fix the following error:
Template process failed: undef error - Not a HASH reference at
/home/vagrant/kohaclone/Koha/Template/Plugin/Branches.pm line 96.
 at /home/vagrant/kohaclone/C4/Templates.pm line 122

Koha::Libraries->pickup_locations does not always return an array, but
arrayref if $biblio is not a Koha::Biblio object.

I do not think it's the correct fix, the pattern in
Koha::Libraries->pickup_locations is wrong: we should not expect 2
different types for a given parameter, biblio should always be a
Koha::Biblio (idem for item btw).
That could be fixed easily if the template had the Koha::Biblio object
sent.

Signed-off-by: Caroline Cyr La Rose <caroline.cyr-la-rose@inlibro.com>
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>