Bug 17185: Staff client shows "Lists that include this title:" even if item is not...

Bug 17185: Staff client shows "Lists that include this title:" even if item is not in a list

In the staff client, the text "Lists that include this title:"
is always shown, regardless of whether the item is in a list
or not. This patch fixes that.

Test plan:
1) Log in to staff client.
2) Go to biblio details view:
   /cgi-bin/koha/catalogue/detail.pl?biblionumber=X
   Confirm that "Lists that include this title:" is
   shown even if the item is not in a list.
3) Apply the patch.
4) Repeat step 2. Confirm that the patch works, i.e.
   "Lists that include this title:" is only shown
   for biblios that are actually in a list.

Signed-off-by: Marcel de Rooy <m.de.rooy@rijksmuseum.nl>
Only applies to non-XSLT view.

Signed-off-by: Nick Clemens <nick@bywatersolutions.com>
Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>