Fix fairly harmless OOB read from MAV_0001.3G2.asan.4f.188
Review URL: https://chromiumcodereview.appspot.com/9309087

git-svn-id: http://src.chromium.org/svn/trunk/deps/third_party/ffmpeg/source@120624 4ff67af0-8c30-449e-8e8b-ad334ec8d88c
1 file changed