Bug 25508: (QA follow-up) Add interface

Bug 25508: (QA follow-up) Add interface

These patches are making the call for an amount match the call for a specific line,
we should also match the passing of interface to ensure the correct pref is checked

Signed-off-by: Nick Clemens <nick@bywatersolutions.com>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>
(cherry picked from commit 97c168704b576bf59e4778417f066c1097d3014d)
Signed-off-by: Fridolin Somers <fridolin.somers@biblibre.com>
(cherry picked from commit 808fa2a3e2f7aeeb10edc6e5838b5281afdf5da1)

Signed-off-by: Andrew Fuerste-Henry <andrew@bywatersolutions.com>