From 764b9cc648edf1a408e88e560aac79661b51b7be Mon Sep 17 00:00:00 2001
From: rudolfkoenig <rudolfkoenig@2b470e98-0d58-463d-a4d8-8e2adae1ed80>
Date: Sun, 9 Dec 2018 11:00:24 +0000
Subject: [PATCH] 10_MQTT2_DEVICE.pm: fix WARNING if message is empty (Forum
 #90145)

git-svn-id: https://svn.fhem.de/fhem/trunk@17928 2b470e98-0d58-463d-a4d8-8e2adae1ed80
---
 fhem/FHEM/10_MQTT2_DEVICE.pm | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/fhem/FHEM/10_MQTT2_DEVICE.pm b/fhem/FHEM/10_MQTT2_DEVICE.pm
index a9865136d..828ada690 100644
--- a/fhem/FHEM/10_MQTT2_DEVICE.pm
+++ b/fhem/FHEM/10_MQTT2_DEVICE.pm
@@ -116,7 +116,8 @@ MQTT2_DEVICE_Parse($$)
           readingsBeginUpdate($hash);
           foreach my $k (keys %{$ret}) {
             readingsBulkUpdate($hash, $k, $ret->{$k});
-            push(@retData, "$k $ret->{$k}");
+            my $msg = ($ret->{$k} ? $ret->{$k} : "");
+            push(@retData, "$k $msg");
             checkForGet($hash, $k, $ret->{$k});
           }
           readingsEndUpdate($hash, 1);