VLC_EXPORT( msg_subscription_t*, __msg_Subscribe, ( vlc_object_t *, int ) );
VLC_EXPORT( void, __msg_Unsubscribe, ( vlc_object_t *, msg_subscription_t * ) );
VLC_EXPORT( msg_subscription_t*, __msg_Subscribe, ( vlc_object_t *, int ) );
VLC_EXPORT( void, __msg_Unsubscribe, ( vlc_object_t *, msg_subscription_t * ) );