Bug 18179: Update existing calls

This patch updates the existing occurrences of ->find called in a list
context.
There are certainly others that are not easy to catch with git grep.
Test plan:
Confirm that the 4 modified scripts still works as expected.

We need this one ASAP in master to make sure we will not get other
side-effects of this kind and to catch possible uncaught occurrences
before the release.

Tested scripts changed by this patch, they work as expected.
Signed-off-by: Marc Véron <veron@veron.ch>

Signed-off-by: Nick Clemens <nick@bywatersolutions.com>

Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>

members/memberentry.pl

@@ -753,7 +753,7 @@ $template->param( csrf_token =>
 
 # HouseboundModule data
 $template->param(
-    housebound_role  => Koha::Patron::HouseboundRoles->find($borrowernumber),
+    housebound_role  => scalar Koha::Patron::HouseboundRoles->find($borrowernumber),
 );
 
 if(defined($data{'flags'})){

opac/opac-user.pl

@@ -330,7 +330,7 @@ if (   C4::Context->preference('AllowPatronToSetCheckoutsVisibilityForGuarantor'
 }
 
 $template->param(
-    borrower                 => Koha::Patrons->find($borrowernumber),
+    borrower                 => scalar Koha::Patrons->find($borrowernumber),
     patron_messages          => $patron_messages,
     opacnote                 => $borr->{opacnote},
     patronupdate             => $patronupdate,