Return a GdkPixbufLoader, not a GtkObject.

Return a GdkPixbufLoader, not a GtkObject.

1999-10-27  Federico Mena Quintero  <federico@redhat.com>

	* src/gdk-pixbuf-loader.c (gdk_pixbuf_loader_new): Return a
	GdkPixbufLoader, not a GtkObject.
	(gtk_marshal_NONE__INT_INT_INT_INT): Made static.
	(gdk_pixbuf_loader_get_type): Documented.
	(gdk_pixbuf_loader_class_init): Initialize the parent class
	correctly.
	(gdk_pixbuf_loader_destroy): Added sanity checks. Call the parent
	class destroy function.
	(gdk_pixbuf_loader_new): Documented.
	(gdk_pixbuf_loader_finalize): Call the parent class finalize
	function.
	(gdk_pixbuf_loader_write): Use size_t for count.