Bug 21641: (follow-up) Address additional call

Bug 21641: (follow-up) Address additional call

This patch makes the same change as the main patch, just for an
additional occurance of getnextacctno

Signed-off-by: Alex Buckley <alexbuckley@catalyst.net.nz>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>
Signed-off-by: Nick Clemens <nick@bywatersolutions.com>
(cherry picked from commit 6fba062d291e065b4a6d7ffebdf82db9d6935971)
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>
(cherry picked from commit e79fac32c8ca7ef01b516feea461a07c7e8e3570)
Signed-off-by: Fridolin Somers <fridolin.somers@biblibre.com>