Bug 35263: (QA follow-up) Update code

Bug 35263: (QA follow-up) Update code

Thank you Jonathan. I first tried with '||' but it would fallback to 1
for either undef or 0 (we want the first case, but not the second).
But using '//' instead, it only falls back to 1 if undef, and not when 0.
Today I learned between '||' and '//'! Thanks!

From perldoc.perl.org (relating to '//'):
'In fact, it's exactly the same as ||, except that it tests the left hand
side's definedness instead of its truth.'

Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>