File gtk-warn-fix.patch of Package gtk-sharp2

--- atk/glue/object.c
+++ atk/glue/object.c
@@ -31,6 +31,7 @@
 	if (!klass)
 		klass = g_type_class_ref (gtype);
 	((AtkObjectClass *) klass)->get_n_children = cb;
+	return 0;
 }
 
 AtkObject* atksharp_object_override_ref_child (GType gtype, gpointer cb);
@@ -42,4 +43,5 @@
 	if (!klass)
 		klass = g_type_class_ref (gtype);
 	((AtkObjectClass *) klass)->ref_child = cb;
+	return NULL;
 }