[REGRESSION] [FIX] ->iter_nth_child accept null iterators

[Thierry Vignaud <tvignaud mandrakesoft com>]

this regression (->iter_nth_child not accepting anymore undefined
iterators) broke rpmdrake.

the following patch fix it:

--- ./xs/GtkTreeModel.xs.tv	2003-07-22 20:54:08.000000000 +0200
+++ ./xs/GtkTreeModel.xs	2003-07-22 21:01:52.000000000 +0200
@@ -374,7 +374,7 @@
 GtkTreeIter_copy *
 gtk_tree_model_iter_nth_child (tree_model, parent, n)
 	GtkTreeModel *tree_model
-	GtkTreeIter *parent
+	GtkTreeIter_ornull *parent
 	gint n
     PREINIT:
 	GtkTreeIter iter;

btw, could you list me as contributors to Gtk2/AUTHORS :-)

thanks :-)