From eee788f45a7b89c8484b23b8520c9adde78832f3 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Martin=20Gr=C3=A4=C3=9Flin?= <kde@martin-graesslin.com>
Date: Sun, 13 Sep 2009 13:46:58 +0000
Subject: [PATCH] Don't crash when focus chain is empty.

svn path=/trunk/KDE/kdebase/workspace/; revision=1022903
---
 tabbox.cpp | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/tabbox.cpp b/tabbox.cpp
index b9867f044b..62f28ee297 100644
--- a/tabbox.cpp
+++ b/tabbox.cpp
@@ -91,8 +91,13 @@ QString TabBoxHandlerImpl::desktopName( int desktop ) const
 
 TabBoxClient* TabBoxHandlerImpl::nextClientFocusChain( TabBoxClient* client ) const
     {
-    Client* current = (static_cast< TabBoxClientImpl* >( client ))->client();
-    return Workspace::self()->nextClientFocusChain( current )->tabBoxClient();
+    if( TabBoxClientImpl* c = static_cast< TabBoxClientImpl* >( client ) )
+        {
+        Client* next = Workspace::self()->nextClientFocusChain( c->client() );
+        if( next )
+            return next->tabBoxClient();
+        }
+    return NULL;
     }
 
 int TabBoxHandlerImpl::nextDesktopFocusChain( int desktop ) const