Fixed clusterfuzz found crash

BUG=343461
R=senorblanco@google.com, senorblanco@chromium.org, reed@chromium.org, reed@google.com

Author: sugoi@chromium.org

Review URL: https://codereview.chromium.org/162943003

git-svn-id: http://skia.googlecode.com/svn/trunk@13439 2bbb7eff-a529-9590-31e7-b0007b416f81
1 file changed