UObject: Fix SEGV when calling emit() from a thread.
UObject: Fix SEGV when calling emit() from a thread.

	* src/kernel/uobject.cc (doEmit): Take the objects_type by
	value.
	(emit): LOCK_KERNEL, rObject manipulation might not be
	thread-safe.

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