From 4e6880616f7d4a914cab44b11eb0559b95717f9b Mon Sep 17 00:00:00 2001
From: rudolfkoenig <>
Date: Thu, 13 Apr 2017 19:04:11 +0000
Subject: [PATCH] fhem.pl: Do not regexp-check undef in ReadingsNum (Forum
 #70496)

git-svn-id: https://svn.fhem.de/fhem/trunk@13983 2b470e98-0d58-463d-a4d8-8e2adae1ed80
---
 fhem/fhem.pl | 1 +
 1 file changed, 1 insertion(+)

diff --git a/fhem/fhem.pl b/fhem/fhem.pl
index 575c7c371..0772743ee 100755
--- a/fhem/fhem.pl
+++ b/fhem/fhem.pl
@@ -3974,6 +3974,7 @@ ReadingsNum($$$;$)
 {
   my ($d,$n,$default,$round) = @_;
   my $val = ReadingsVal($d,$n,$default);
+  return undef if(!defined($val));
   $val = ($val =~ /(-?\d+(\.\d+)?)/ ? $1 : "");
   $val = round($val,$round) if($round);
   return $val;