Multiple matchbox-keyboard instances would occupy whole screen and cause X
window segfault(Bug 509). Making matchbox-keyboard singleton is one work
around.

This patch allow only one instance of matchbox-keyboard based on some mechanism
in matchbox-desktop. In future, an applet and GTK-IM modules in
matchbox-keyboard can be used to automatically map/unmap the virtual keyboard
on demand.

Signed-off-by: Zhai Edwin <edwin.zhai@intel.com>

Upstream-Status: Inappropriate [configuration]

Index: matchbox-keyboard/matchbox-keyboard.desktop
===================================================================
--- matchbox-keyboard.orig/matchbox-keyboard.desktop	2010-12-22 20:41:40.000000000 +0800
+++ matchbox-keyboard/matchbox-keyboard.desktop	2010-12-22 20:42:12.000000000 +0800
@@ -6,3 +6,5 @@
 Icon=matchbox-keyboard.png
 Categories=Panel;Utility;MB
 X-MB-INPUT-MECHANSIM=True
+X-MB-SingleInstance=true
+StartupNotify=true