From b23c47dd7312a8aa74ac1b1fbf18ebc40bd1dac8 Mon Sep 17 00:00:00 2001
From: rudolfkoenig <rudolfkoenig@2b470e98-0d58-463d-a4d8-8e2adae1ed80>
Date: Mon, 16 Sep 2019 07:06:59 +0000
Subject: [PATCH] AttrTemplate.pm: par checks for undef, not for true (Forum
 #103731)

git-svn-id: https://svn.fhem.de/fhem/trunk@20170 2b470e98-0d58-463d-a4d8-8e2adae1ed80
---
 fhem/FHEM/AttrTemplate.pm | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fhem/FHEM/AttrTemplate.pm b/fhem/FHEM/AttrTemplate.pm
index 751323dcd..2010c821a 100644
--- a/fhem/FHEM/AttrTemplate.pm
+++ b/fhem/FHEM/AttrTemplate.pm
@@ -157,7 +157,7 @@ AttrTemplate_Set($$@)
       $perl_code =~ s/\\DEVICE/DEVICE/g;
       my $ret = eval $perl_code;
       return "Error checking template regexp: $@" if($@);
-      if($ret) {
+      if(defined($ret)) {
         $repl{$parname} = $ret;
         next;
       }