From 58651f2219ced5656573a2c11fa31f6a266c3782 Mon Sep 17 00:00:00 2001
From: Tomas Cohen Arazi <tomascohen@theke.io>
Date: Mon, 2 Aug 2021 10:04:01 -0300
Subject: [PATCH] Bug 28741: (follow-up) Silence warning

Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>

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

Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>
---
 Koha/OAI/Server/ResumptionToken.pm | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/Koha/OAI/Server/ResumptionToken.pm b/Koha/OAI/Server/ResumptionToken.pm
index 7f77542cb4..fb1d5cd01d 100644
--- a/Koha/OAI/Server/ResumptionToken.pm
+++ b/Koha/OAI/Server/ResumptionToken.pm
@@ -61,6 +61,9 @@ sub new {
         $next_id = $args{ next_id } // 0;
     }
 
+    # metadata_prefix can be undef (e.g. listSets)
+    $metadata_prefix //= '';
+
     $self->{ metadata_prefix } = $metadata_prefix;
     $self->{ cursor          } = $cursor;
     $self->{ from            } = $from;
-- 
2.39.5