From b1ef3eb088398d1c51d790f4d70a1c5c6e8d7b41 Mon Sep 17 00:00:00 2001
From: justme-1968 <justme-1968@users.noreply.github.com>
Date: Wed, 16 Jul 2014 07:46:03 +0000
Subject: [PATCH] fixed warning for uninitialized value in pattern match

git-svn-id: https://svn.fhem.de/fhem/trunk@6262 2b470e98-0d58-463d-a4d8-8e2adae1ed80
---
 fhem/FHEM/33_readingsGroup.pm | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fhem/FHEM/33_readingsGroup.pm b/fhem/FHEM/33_readingsGroup.pm
index 202254d3e..24dee341e 100644
--- a/fhem/FHEM/33_readingsGroup.pm
+++ b/fhem/FHEM/33_readingsGroup.pm
@@ -556,7 +556,7 @@ readingsGroup_2html($)
         $first = 0;
         next;
       } else {
-        if( $regex =~ m/(.*)@(.*)/ ) {
+        if( $regex && $regex =~ m/(.*)@(.*)/ ) {
           $regex = $1;
           $name = $2;
           if( $name =~ m/^{(.*)}$/ ) {