From 0d5bb99d1569c7f9c5b1b0f7fef9300821603f14 Mon Sep 17 00:00:00 2001
From: Marcel de Rooy <m.de.rooy@rijksmuseum.nl>
Date: Mon, 13 Dec 2021 13:23:57 +0000
Subject: [PATCH] Bug 29687: Uninitialized warning C4/XSLT line 286

From plack-opac-error.log:
[WARN] Use of uninitialized value $value in concatenation (.) or string at /usr/share/koha/C4/XSLT.pm line 286.

Test plan:
An opac search triggered the warning. So repeat it without warns.

Signed-off-by: Marcel de Rooy <m.de.rooy@rijksmuseum.nl>

Signed-off-by: Nick Clemens <nick@bywatersolutions.com>
Signed-off-by: Fridolin Somers <fridolin.somers@biblibre.com>

Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>
(cherry picked from commit 74382c321c16348919f83f63e505dea93239c2ca)

Signed-off-by: Andrew Fuerste-Henry <andrew@bywatersolutions.com>
---
 C4/XSLT.pm | 1 +
 1 file changed, 1 insertion(+)

diff --git a/C4/XSLT.pm b/C4/XSLT.pm
index a5a0c2feed..b9c99faca0 100644
--- a/C4/XSLT.pm
+++ b/C4/XSLT.pm
@@ -269,6 +269,7 @@ sub XSLTParse4Display {
     }
     my $varxml = "<variables>\n";
     while (my ($key, $value) = each %$variables) {
+        $value //= q{};
         $varxml .= "<variable name=\"$key\">$value</variable>\n";
     }
     $varxml .= "</variables>\n";
-- 
2.39.5