`queue' was unsigned so the test did not work.
Signed-off-by: NRoel Kluin <roel.kluin@gmail.com>
Reviewed-by: NPavel Roskin <proski@gnu.org>
Acked-by: NZhu Yi <yi.zhu@intel.com>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>