[cairo] pangocairo problem

[Bill Spitzak]

The following code prints "not a family!" 188 times. That does not seem 
to be what the pango docs claim it will do!

   cairo_surface_t* surface = cairo_xlib_surface_create(...);
   cairo_t* cr = cairo_create(surface);
   PangoLayout *layout = pango_cairo_create_layout (cr);
   PangoContext* context = pango_layout_get_context(layout);
   PangoFontFamily** families; int n;
   pango_context_list_families(context, &families, &n);
   for (int i=0; i < n; i++) {
     PangoFontFamily* family = families[n];
     if (PANGO_IS_FONT_FAMILY(family))
       printf("%s\n", pango_font_family_get_name(family));
     else
       printf("not a family!\n");
   }
   g_free(families);

surface, cr, and layout all seem to work fine otherwise and I can draw 
text into the window with them.

System is Ubuntu 11.04. Cairo and pixman are from the current git 
repository, but pango is the one included with Ubuntu. This program is 
*not* using gtk but just the cairopango dependencies.

Help?

PS: Obviously I am trying to get a list of available fonts. If this is 
the wrong approach please tell me.