static void interface_set_compression_level(QXLInstance *sin, int level)
{
    dprint(1, "%s/%d:\n", __func__, sin->id);
    /* nothing to do */
}

static void interface_set_compression_level(QXLInstance *sin, int level)
{
    dprint(1, "%s/%d:\n", __func__, sin->id);
    /* nothing to do */
}
