Created attachment 266440 [details] [review]
stage: Check coordinate validity in do_pick()

We do some argument validation inside _clutter_stage_do_pick(), which is
the internal version of clutter_stage_get_actor_at_pos(), but we don't
do coordinate space validation, and instead we rely on call sites doing
the right thing.

We should, instead, remove the argument validation from the internal
function, which is pointless and against the coding practices, but do
coordinate space validation internally.

attachment 266440 [details] [review] pushed to clutter-1.18