From 2ea147db47626a4e2ff82c4ca5b7ba92827ce36e Mon Sep 17 00:00:00 2001
From: Jonathan Druart <jonathan.druart@bugs.koha-community.org>
Date: Thu, 22 Feb 2018 15:37:27 -0300
Subject: [PATCH] Bug 20287: Remove warning

If there are no patrons in DB:
Use of uninitialized value  in addition (+)

Signed-off-by: Josef Moravec <josef.moravec@gmail.com>

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

Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>

Signed-off-by: Nick Clemens <nick@bywatersolutions.com>
---
 Koha/Patron.pm | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Koha/Patron.pm b/Koha/Patron.pm
index 3d2456cc9e..1c245262ba 100644
--- a/Koha/Patron.pm
+++ b/Koha/Patron.pm
@@ -106,7 +106,7 @@ sub fixup_cardnumber {
         select => \'CAST(cardnumber AS SIGNED)',
         as => ['cast_cardnumber']
     })->_resultset->get_column('cast_cardnumber')->max;
-    $self->cardnumber($max+1);
+    $self->cardnumber(($max || 0) +1);
 }
 
 # trim whitespace from data which has some non-whitespace in it.
-- 
2.39.5