From 1235d469a1ac07a788897e3c074c700ed2309725 Mon Sep 17 00:00:00 2001
From: rudolfkoenig <rudolfkoenig@2b470e98-0d58-463d-a4d8-8e2adae1ed80>
Date: Fri, 27 Mar 2020 10:22:34 +0000
Subject: [PATCH] fhem.pl: fix hashKeyRename Warning for undefined value (Forum
 #109566)

git-svn-id: https://svn.fhem.de/fhem/trunk@21524 2b470e98-0d58-463d-a4d8-8e2adae1ed80
---
 fhem/fhem.pl | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/fhem/fhem.pl b/fhem/fhem.pl
index 300169925..60a509414 100755
--- a/fhem/fhem.pl
+++ b/fhem/fhem.pl
@@ -5256,7 +5256,8 @@ hashKeyRename($$$)
   my ($hash, $r1, $r2) = @_;
   my (%repl, %ret);
   for my $k (keys %{$hash}) {
-    $repl{$1} = $2 if("$k:$hash->{$k}" =~ m/$r1/ && defined($1) && defined($2));
+    $repl{$1} = $2 if(defined($hash->{$k}) &&
+       "$k:$hash->{$k}" =~ m/$r1/ && defined($1) && defined($2));
   }
   for my $k (keys %{$hash}) {
     my $val = $hash->{$k};