Cairo PNG export with --size (was: Pending patches for Dia 0.98?)

["W. Martin Borgert" <debacle debian org>]

Quoting "Hans Breuer" <hans breuer org>:
> Maybe you want to extend one of the lists, by working on
> some unfinished patches, like:

There is an "unfinished corner" in the area of PNG exporters.
I rely on the --size option for PNG exports, but it is only
supported by the "png-libart" output filter, not (yet) by
Cairo. OTOH, Cairo supports transformations etc. It would be
nice to allow --size together with Cairo. I have no patch,
however.