From 9f1735f70501336efbee55eaa1856bbb49f50361 Mon Sep 17 00:00:00 2001
From: justme1968 <justme1968@2b470e98-0d58-463d-a4d8-8e2adae1ed80>
Date: Sat, 3 May 2014 13:48:48 +0000
Subject: [PATCH] visibility check fix

git-svn-id: svn://svn.code.sf.net/p/fhem/code/trunk@5733 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 4f6ec9c98..c77a5bc08 100644
--- a/fhem/FHEM/33_readingsGroup.pm
+++ b/fhem/FHEM/33_readingsGroup.pm
@@ -684,7 +684,7 @@ readingsGroup_Notify($$)
         Log3 $name, 5, "$name: not on any display, ignoring notify";
         return undef;
       } else {
-        if( $FW_visibleDeviceHash{$name} ) {
+        if( defined($FW_visibleDeviceHash{$name}) ) {
         } else {
           Log3 $name, 5, "$name: no longer visible, ignoring notify";
           delete( $hash->{mayBeVisible} );