Bug 8006 - Loading offline circulation does not anonymize

Simple, one line fix. Added the privacy parameter to the list
of parameters passed to C4::Circulation::MarkIssueReturned.

Signed-off-by: Paul Poulain <paul.poulain@biblibre.com>

offline_circ/process_koc.pl

@@ -329,7 +329,8 @@ sub kocReturnItem {
             $borrowernumber,
             $item->{'itemnumber'},
             undef,
-            $circ->{'date'}
+            $circ->{'date'},
+            $borrower->{'privacy'}
         );
 
         ModItem({ onloan => undef }, $item->{'biblionumber'}, $item->{'itemnumber'});