--- kdebase/kwin/tabbox.cpp	2006/02/27 09:54:03	514048
+++ kdebase/kwin/tabbox.cpp	2006/03/31 10:42:59	524823
@@ -1152,6 +1152,8 @@
 */
 Client* Workspace::nextFocusChainClient( Client* c ) const
     {
+    if ( !c )
+        return 0;
     int desktop = c->isOnAllDesktops() ? currentDesktop() : c->desktop();
     if ( focus_chain[desktop].isEmpty() )
         return 0;
@@ -1170,6 +1172,8 @@
 */
 Client* Workspace::previousFocusChainClient( Client* c ) const
     {
+    if ( !c )
+        return 0;
     int desktop = c->isOnAllDesktops() ? currentDesktop() : c->desktop();
     if ( focus_chain[desktop].isEmpty() )
         return 0;