From bfde60a850859acaa8ef56b82c47677619c9f56a Mon Sep 17 00:00:00 2001
From: justme-1968 <justme-1968@users.noreply.github.com>
Date: Wed, 9 Oct 2013 20:19:17 +0000
Subject: [PATCH] fix: allow undef valueFormat

git-svn-id: https://svn.fhem.de/fhem/trunk/fhem@4027 2b470e98-0d58-463d-a4d8-8e2adae1ed80
---
 FHEM/33_readingsGroup.pm | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/FHEM/33_readingsGroup.pm b/FHEM/33_readingsGroup.pm
index 0b1ce4bb4..ae8a229bc 100644
--- a/FHEM/33_readingsGroup.pm
+++ b/FHEM/33_readingsGroup.pm
@@ -192,7 +192,7 @@ lookup2($$$$)
     my $READING = $reading;
     my $VALUE = $value;
     $lookup = eval $lookup;
-    $lookup = "" if( !$lookup );
+    $lookup = "" if( $@ );
   }
 
   return $lookup;