[Vala] New params for [ModuleInit]

[JM <interflug1 gmx net>]

Hello everybody
This valac commit shows that there has been some change with
[ModuleInit]:
http://git.gnome.org/browse/vala/commit/?id=5fd7b8cebb983fccdebcd9329671d94c1e5cf826

The example on http://live.gnome.org/Vala/TypeModules is showing an
example exactly as I am using it in my application:

[ModuleInit]
public Type register_plugin (TypeModule module) {
    // types are registered automatically
    return typeof (MyPlugin);
}

Here, valac reports "error: [ModuleInit] requires a parameter of type `GLib.TypeModule'
public Type init_module() {"

Can someone please tell me what the expected usage of [ModuleInit] would be?
 - vala-0.9.1 -
Any hints appreciated!
Regards
Jörn