From 75842c7d620938274c728417188b3939a136eedb Mon Sep 17 00:00:00 2001
From: Galen Charlton <gmc@esilibrary.com>
Date: Wed, 24 Jul 2013 16:55:52 +0000
Subject: [PATCH] Bug 10462: (follow-up) remove some undefined variable warning
 noise

Signed-off-by: Galen Charlton <gmc@esilibrary.com>
---
 C4/Breeding.pm | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/C4/Breeding.pm b/C4/Breeding.pm
index 55069db317..9527f0fa87 100644
--- a/C4/Breeding.pm
+++ b/C4/Breeding.pm
@@ -443,7 +443,8 @@ sub _add_rowdata {
 }
 
 sub _isbn_replace {
-    my ($isbn)= @_;
+    my ($isbn) = @_;
+    return unless defined $isbn;
     $isbn =~ s/ |-|\.//g;
     $isbn =~ s/\|/ \| /g;
     $isbn =~ s/\(/ \(/g;
-- 
2.20.1