Bug 23551: Fix AddRenewal call in circ/renew.pl

Bug 23551: Fix AddRenewal call in circ/renew.pl

Without the patch, renewing from the renewal tab/page
led to wrong renewal/due dates.

To test:
- Check an item out to your patron account
- Renew it from the patron account
- Note the due date
- Return the item
- Check the item out again
- Renew it using the renewal tab
- Verify a different due date was calculated
- Apply patch
- Repeat test - due dates now should be the same

Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>