fonts, bounding-rectangles on beagle

Hi all,

JWZ's blog might be of interest for those wondering about implementing
TEXT-BOUNDING-RECTANGLE* on beagle: it looks like he has exactly the
same problem at <http://jwz.livejournal.com/628853.html>.  (Something
similar might be needed for the gtk and/or cairo backends, who knows?)

Cheers,

Christophe