Bug 37111: Fix renew link on opac-user.tt

Bug 37111: Fix renew link on opac-user.tt

To test:
1. Check some items out to a patron
2. Set the username and apssword for the patron so that you can log in as that patron.
3. Log in to the OAPC as that patron.
4. Go to Your account > Summary (the default landing page after you log in).
5. Click "Renew" for one of the items.
6. You get the error as above.
7. APPLY PATCH
8. Try steps 1 -5 again, you should not get an error.

Signed-off-by: David Nind <david@davidnind.com>
Signed-off-by: Alexander Wagner <alexander.wagner@desy.de>
Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>