Add an GError parameter.

Add an GError parameter.

2006-06-21  Matthias Clasen  <mclasen@redhat.com>

	* gtk/gtkprintbackend.h:
	* gtk/gtkprintbackend.c (gtk_print_backend_print_stream): Add an
	GError parameter.

	* modules/printbackends/file/gtkprintbackendfile.c
	(gtk_print_backend_file_print_stream):
	* modules/printbackends/lpr/gtkprintbackendlpr.c
	(gtk_print_backend_lpr_print_stream):
	* modules/printbackends/cups/gtkprintbackendcups.c
	(gtk_print_backend_cups_print_stream):
	* gtk/gtkprintjob.c (gtk_print_job_send): Update all callers and
	implementations.