[cairo] Serious concerns about cairo

[Bertram Felgenhauer]

Behdad Esfahbod wrote:
> That will keep working.  We are talking about these sequences:
> 
>   cairo_set_pen_size
>   cairo_scale
>   cairo_stroke

Aha. That looks familiar now but I had forgotten about it. Thanks for
pointing it out. I don't see any problems with that either, basically
it's just giving the pen the same privilege of being unaffected by
future transforms as is already done for paths.

Bertram