libgnomecanvas and pango-ft2

[Paul Davis <paul linuxaudiosystems com>]

the text item of libgnomecanvas has some tight linkage to the pango FT2
backend as a result of calling pango_ft2_get_context(). 

is there a technical reason that this was used rather than
gdk_get_pango_context_for_screen()? as it, it makes it impossible to use
the canvas when pango is not implemented with FT2 support (e.g. on the
quartz-based gtk/osx port)

--p