tree 5c245854f2de4b21f501bd9072f54a1c6893852b
parent ff1740394e23ba23c8e78e3c06f7940103fa3c8b
author caryclark <caryclark@google.com> 1468952954 -0700
committer Commit bot <commit-bot@chromium.org> 1468952955 -0700

fix fuzzer

Previous spans always have a valid next pointer. The final span does not.
Change the test for a valid link to take into consideration whether
the links are chased forwards or backwards.

TBR=reed@google.com
BUG=629454
GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2166543002

Review-Url: https://codereview.chromium.org/2166543002