Using clutter_stage_get_actor_at_pos() rather than synthesizing
events; the synthesized events were being compressed, so we were
only tesitng one pick per frame.
http://bugzilla.openedhand.com/show_bug.cgi?id=1637
Signed-off-by: Emmanuele Bassi <ebassi@linux.intel.com>
The picking test has two configurables: the number of actors and
the number of events per frame. It makes sense to have them as
command line options to test with multiple configurations without
having to change defines and recompile.