Bug 27796: (QA follow-up) Fix for missing 'Account credit'

Bug 27796: (QA follow-up) Fix for missing 'Account credit'

Good catch Sally!  The data-member attribute was using an incorrect
parameter name to fetch the accountline borrowernumber data.

Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>
Signed-off-by: Nick Clemens <nick@bywatersolutions.com>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>
(cherry picked from commit 1dd6e0bd30cf3e9570adcea112ba65cb6f69b608)
Signed-off-by: Fridolin Somers <fridolin.somers@biblibre.com>