close display and delete stuff on exit

git-svn-id: svn+ssh://svn.berlios.de/svnroot/repos/slim/trunk@111 7c53e7cc-98ea-0310-8f1f-a0b24da60408

app.cpp

@@ -438,10 +438,12 @@ void App::Exit() {
         LoginPanel->Message(testmsg);
         sleep(3);
     } else {
-        delete LoginPanel;
         StopServer();
         RemoveLock();
     }
+    XCloseDisplay(Dpy);
+    delete LoginPanel;
+    delete cfg;
     exit(OK_EXIT);
 }