From eacc9866a0c336469051e3edfe0b5bc7a27cd084 Mon Sep 17 00:00:00 2001
From: rudolfkoenig <rudolfkoenig@2b470e98-0d58-463d-a4d8-8e2adae1ed80>
Date: Thu, 21 Jan 2016 11:07:44 +0000
Subject: [PATCH] 00_ZWDongle.pm: Fix disconnect on Windows (Forum #47732)

git-svn-id: https://svn.fhem.de/fhem/trunk@10584 2b470e98-0d58-463d-a4d8-8e2adae1ed80
---
 fhem/FHEM/00_ZWDongle.pm | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/fhem/FHEM/00_ZWDongle.pm b/fhem/FHEM/00_ZWDongle.pm
index 93596f087..f57ebbb6d 100755
--- a/fhem/FHEM/00_ZWDongle.pm
+++ b/fhem/FHEM/00_ZWDongle.pm
@@ -689,6 +689,10 @@ ZWDongle_Ready($)
   my $po = $hash->{USBDev};
   if($po) {
     my ($BlockingFlags, $InBytes, $OutBytes, $ErrorFlags) = $po->status;
+    if(!defined($InBytes)) {
+      DevIo_Disconnected($hash);
+      return 0;
+    }
     return ($InBytes>0);
   }
   return 0;