add field for GPdfView (gc_setup_widgets, gc_set_pdf_cb,

add field for GPdfView (gc_setup_widgets, gc_set_pdf_cb,

* xpdf/gpdf-control.cc (_GpdfControlPrivate): add field for
GPdfView
(gc_setup_widgets, gc_set_pdf_cb, verb_GoPageLast_cb)
(verb_GoPageFirst_cb, verb_GoPageNext_cb, verb_GoPagePrev_cb): use
GPdfView instead of PdfView

* xpdf/gpdf-view.cc, xpdf/gpdf-view.h: widget for for GPOutputDev
to draw on. Using GnomePrintPreview.

* xpdf/GPOutputDev.cc, xpdf/GPOutputDev.h: new Gnome Print Output
Device class, strokes and fills look (surprisingly) quite okay,
font and text handling is throw-away code

* xpdf/gpdf-util.h (BEGIN_C_DECLS, END_C_DECLS): remove macros,
use those from glib
(GPDF_BOILERPLATE, GPDF_CLASS_BOILERPLATE, GPDF_REGISTER_TYPE):
macros from bonobo-macros.h and gnome-macros.h compatible with
c++ type system rules

* xpdf/OutputDev.h: declare class Object

* xpdf/Gfx.h: include Object.h

* configure.in: check for libgnomeprint(ui)-2.0