UObject-remote: Fix incorrect behavior when watching slots on non-uobjects.
UObject-remote: Fix incorrect behavior when watching slots on non-uobjects.

	* share/urbi/uobject.u: Check that 'lobby' is actualy a local slot
	before using it.

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