2006-05-05  Christian Persch  <chpe@cvs.gnome.org>

	* modules/printbackends/cups/gtkprintbackendcups.c:
	* modules/printbackends/lpr/gtkprintbackendlpr.c:
	* modules/printbackends/pdf/gtkprintbackendpdf.c: Always register
	  the type with the type module, even if it had been registered
	  before. Fixes bug #340676.