From 0bd0fde1499bee4b1a72075d045f72210b4b0612 Mon Sep 17 00:00:00 2001
From: markusbloch <>
Date: Thu, 12 Dec 2013 16:14:06 +0000
Subject: [PATCH] FB_CALLMONITOR: fix "use of uninitialized value" message

git-svn-id: https://svn.fhem.de/fhem/trunk@4367 2b470e98-0d58-463d-a4d8-8e2adae1ed80
---
 fhem/FHEM/72_FB_CALLMONITOR.pm | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fhem/FHEM/72_FB_CALLMONITOR.pm b/fhem/FHEM/72_FB_CALLMONITOR.pm
index 66b215f52..77b40e3ba 100755
--- a/fhem/FHEM/72_FB_CALLMONITOR.pm
+++ b/fhem/FHEM/72_FB_CALLMONITOR.pm
@@ -215,7 +215,7 @@ FB_CALLMONITOR_Read($)
    $external_number = $array[3] if(not $array[3] eq "0" and $array[1] eq "RING" and $array[3] ne "");
    $external_number = $array[5] if($array[1] eq "CALL" and $array[3] ne "");
   
-   $external_number =~ s/^0// if(AttrVal($name, "remove-leading-zero", "0") eq "1");
+   $external_number =~ s/^0// if(AttrVal($name, "remove-leading-zero", "0") eq "1" and defined($external_number));
   
    if(defined($external_number) and not $external_number =~ /^0/ and $area_code ne "")
    {