tree 1c7ef8b768473df8d249b3c3168285e9ffc889af
parent 8161da7a0e54bc4af36e49353e4caad02de384dc
author Todd Kennedy <toddke@google.com> 1447713696 -0800
committer Todd Kennedy <toddke@google.com> 1447713696 -0800

use negative mask

the test should be for _invalid_ bits; as it's written,
it tests for valid bits

Change-Id: Id5e42e865449a7877fe58aca9fb47675fa7452c9