[sane-standard] More device properties

[Étienne Bersac]

Hi,

> this works, but the frontend must always call sane_get_parameters()
> just after it gets an EOF from the backend, but before it calls
> sane_cancel(), in order to determine if there are more pages.

Yes. As you saw in the buttons handling discussion, i really avoid using
options as procedure. e.g. i'll prefer adding a sane_get_status () than
a well know option "status".

Étienne.
-- 
Verso l'Alto !
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