Warning fixes in gnome-guile.

[Kjartan Maraas <kmaraas fib hl no>]

These two small fixes get rid of some compiler-warnings.

Ok to commit?

Cheers
Kjartan
--- guile-gtk.c	Tue May  5 17:08:11 1998
+++ guile-gtk.c.new	Mon May  4 14:06:40 1998
@@ -690,7 +690,7 @@
 void
 sgtk_callback_marshal (GtkObject *obj,
 		       gpointer data,
-		       gint n_args,
+		       guint n_args,
 		       GtkArg *args)
 {
   SCM_STACKITEM stack_item;
--- guile-gtk.h	Tue May  5 17:08:12 1998
+++ guile-gtk.h.new	Mon May  4 14:05:23 1998
@@ -86,7 +86,7 @@
 
 void sgtk_callback_marshal (GtkObject *,
 			    gpointer data,
-			    gint n_args,
+			    guint n_args,
 			    GtkArg *args);
 void sgtk_callback_destroy (gpointer data);