From ab4f47e75d679a7cc44b18ae0f92e98aa65bea86 Mon Sep 17 00:00:00 2001
From: Jonathan Druart <jonathan.druart@bugs.koha-community.org>
Date: Mon, 12 Oct 2020 09:32:16 +0200
Subject: [PATCH] Bug 26529: Remove warning

Use of uninitialized value $rule_value in string eq
---
 Koha/CirculationRules.pm | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Koha/CirculationRules.pm b/Koha/CirculationRules.pm
index 5b63998a8b..743d8f1ab3 100644
--- a/Koha/CirculationRules.pm
+++ b/Koha/CirculationRules.pm
@@ -282,7 +282,7 @@ sub set_rule {
     my $rule_name    = $params->{rule_name};
     my $rule_value   = $params->{rule_value};
     my $can_be_blank = defined $kind_info->{can_be_blank} ? $kind_info->{can_be_blank} : 1;
-    $rule_value = undef if $rule_value eq "" && !$can_be_blank;
+    $rule_value = undef if $rule_value && $rule_value eq "" && !$can_be_blank;
 
     for my $v ( $branchcode, $categorycode, $itemtype ) {
         $v = undef if $v and $v eq '*';
-- 
2.20.1