From 9e5f174fb794fca58de9d45c929a06040791148c Mon Sep 17 00:00:00 2001
From: justme-1968 <justme-1968@users.noreply.github.com>
Date: Sun, 12 Jul 2015 21:45:34 +0000
Subject: [PATCH] 33_readingsHistory.pm: fixed uninitialized value warning

git-svn-id: https://svn.fhem.de/fhem/trunk@8951 2b470e98-0d58-463d-a4d8-8e2adae1ed80
---
 fhem/FHEM/33_readingsHistory.pm | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/fhem/FHEM/33_readingsHistory.pm b/fhem/FHEM/33_readingsHistory.pm
index e06d76c9c..f22b1015a 100644
--- a/fhem/FHEM/33_readingsHistory.pm
+++ b/fhem/FHEM/33_readingsHistory.pm
@@ -227,6 +227,8 @@ readingsHistory_lookup2($$$$)
     $lookup = $vf;
   }
 
+  return $lookup if( !defined($lookup) );
+
   if( !ref($lookup) && $lookup =~ m/^{.*}$/) {
     my $DEVICE = $name;
     my $READING = $reading;