crypto: P224::Contract could produce a non-minimal representation.

I missed an overflow in Contract because I suspected that the prime elimination
would take care of it. It didn't, and I forgot to get back to the overflow.
Because of this, Contract may have produced a non-minimal representation,
causing flakey failures ~0.02% of the time.

BUG=110972
TEST=crypto_unittests


Review URL: http://codereview.chromium.org/9104013

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@119775 0039d316-1c4b-4281-b951-d872f2087c98
1 file changed