Fix UObject remote automatic disconnection.
Fix UObject remote automatic disconnection.

(And add a test for it.)
Fix bug #4587.

	* sdk-remote/src/libuobject/uobject.cc (dispatcher): Die when there is 1 uobject left, not 0.

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