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fhem.pl: add undef check to AttrNum (Forum #70496)

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git-svn-id: https://svn.fhem.de/fhem/trunk@13989 2b470e98-0d58-463d-a4d8-8e2adae1ed80
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rudolfkoenig 2017-04-14 15:01:35 +00:00
parent cfe8915e2b
commit e98e2c8425
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fhem/fhem.pl
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@ -4042,6 +4042,7 @@ AttrNum($$$;$)
{
my ($d,$n,$default,$round) = @_;
my $val = AttrVal($d,$n,$default);
return undef if(!defined($val));
$val = ($val =~ /(-?\d+(\.\d+)?)/ ? $1 : "");
$val = round($val,$round) if($round);
return $val;