From 4e495b69ad23db7672ea4802e00407781eb35afc Mon Sep 17 00:00:00 2001
From: Nick Clemens <nick@bywatersolutions.com>
Date: Tue, 4 Aug 2020 19:37:02 +0000
Subject: [PATCH] Bug 26137: Prevent warns form malformed params

To test:
1 - Tail plack logs
2 - Browse to Tools->Log viewer
3 - Note an error
4 - Apply patch
5 - Confirm error is gone
6 - Confirm everytihg stil works right
---
 tools/viewlog.pl | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/tools/viewlog.pl b/tools/viewlog.pl
index 2ccd472f0e..a988157163 100755
--- a/tools/viewlog.pl
+++ b/tools/viewlog.pl
@@ -53,8 +53,8 @@ my @modules  = $input->multi_param("modules");
 my $user     = $input->param("user") // '';
 my @actions  = $input->multi_param("actions");
 my @interfaces  = $input->multi_param("interfaces");
-my $object   = $input->param("object");
-my $object_type = $input->param("object_type");
+my $object   = $input->param("object") // '';
+my $object_type = $input->param("object_type") // '';
 my $info     = $input->param("info");
 my $datefrom = $input->param("from");
 my $dateto   = $input->param("to");
@@ -91,10 +91,12 @@ if ( $src eq 'circ' ) {
 $template->param(
     debug => $debug,
     C4::Search::enabled_staff_search_views,
-    subscriptionsnumber => CountSubscriptionFromBiblionumber(scalar $input->param('object')),
     object => $object,
 );
 
+my $subscriptionsnumber = CountSubscriptionFromBiblionumber(scalar $input->param('object'));
+$template->param( subscriptionsnumber => $subscriptionsnumber ) if $subscriptionsnumber;
+
 if ($do_it) {
     my $dtf = Koha::Database->new->schema->storage->datetime_parser;
     my %search_params;
-- 
2.11.0