Callback wrappers

[Russell Shaw <rjshaw iprimus com au>]

Hi,

Frequently i have to make an annoying wrapper function just so
that g_slist_foreach() sees the right kind of callback function:

void draw_slist(gpointer data, gpointer user_data)
{
    obj_draw(OBJCLASS(data));
}

Is there any way around this like registering something with g_slist?