From ac17bc371f660c0db4dfec5ef098e682bb1c5e0b Mon Sep 17 00:00:00 2001
From: markusbloch <markusbloch@2b470e98-0d58-463d-a4d8-8e2adae1ed80>
Date: Thu, 9 May 2013 11:16:07 +0000
Subject: [PATCH] fixing use of uninitialized value errors in rare
 circumstances

git-svn-id: svn://svn.code.sf.net/p/fhem/code/trunk@3164 2b470e98-0d58-463d-a4d8-8e2adae1ed80
---
 fhem/FHEM/72_FB_CALLMONITOR.pm | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/fhem/FHEM/72_FB_CALLMONITOR.pm b/fhem/FHEM/72_FB_CALLMONITOR.pm
index 22bb8ce13..7467a900d 100755
--- a/fhem/FHEM/72_FB_CALLMONITOR.pm
+++ b/fhem/FHEM/72_FB_CALLMONITOR.pm
@@ -261,12 +261,12 @@ FB_CALLMONITOR_Read($)
     }
     elsif ($array[1] eq "DISCONNECT")
     {
-	if (($array[3] eq "0") and ($hash->{helper}{MISSED_CALL_DETECTION}{$array[2]}{EVENT} eq "RING")) 
+	if (($array[3] eq "0") and (exists($hash->{helper}{MISSED_CALL_DETECTION}{$array[2]}) and $hash->{helper}{MISSED_CALL_DETECTION}{$array[2]}{EVENT} eq "RING")) 
 	{
             readingsBulkUpdate($hash, "missed_call", $hash->{helper}{MISSED_CALL_DETECTION}{$array[2]}{NUMBER})
 	}
 	
-	delete($hash->{helper}{MISSED_CALL_DETECTION}{$array[2]}) if(defined($hash->{helper}{MISSED_CALL_DETECTION}{$array[2]}));
+	delete($hash->{helper}{MISSED_CALL_DETECTION}{$array[2]}) if(exists($hash->{helper}{MISSED_CALL_DETECTION}{$array[2]}));
     }