Bug 31598: Fix random failure on Jenkins for Upload.t

Bug 31598: Fix random failure on Jenkins for Upload.t

At some point the warn is made conditional for permanent
files. So it failed when TestBuilder picked a zero value
for permanent. Trivial fix.

Test plan:
Run t/db_dependent/Upload.t a few times

Signed-off-by: Marcel de Rooy <m.de.rooy@rijksmuseum.nl>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>
(cherry picked from commit 9a92ee31945af6f535e8be81b3410d13affd8b5f)

Signed-off-by: Lucas Gass <lucas@bywatersolutions.com>
(cherry picked from commit d7bf6f7084cfe00c7f1f4cf17aa525f6c2893f11)
Signed-off-by: Arthur Suzuki <arthur.suzuki@biblibre.com>