uobject: Fix remote notifychange on owned UVar.
uobject: Fix remote notifychange on owned UVar.

	* share/urbi/uobject.u (external.var): Get the correct UVar
	slot in owned mode when transmitting the value.

urbiforge/urbi,urbiforge/urbi,aldebaran/urbi,aldebaran/urbi,urbiforge/urbi,urbiforge/urbi,aldebaran/urbi,urbiforge/urbi,urbiforge/urbi,aldebaran/urbi,urbiforge/urbi,urbiforge/urbi,aldebaran/urbi,urbiforge/urbi,aldebaran/urbi,aldebaran/urbi,aldebaran/urbi