Fix issue 4061.

Issue was that the longest 0 detection wasn't done when there is only one 0 octet. The purpose of this detection is to make sure we don't also compression 0 octet sequences which are not longest.

BUG=4061
R=juberti@webrtc.org, pthatcher@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/33309004

Cr-Original-Commit-Position: refs/heads/master@{#8397}
Cr-Mirrored-From: https://chromium.googlesource.com/external/webrtc
Cr-Mirrored-Commit: b08f4045ec78e9be7d8f637faf71074ed80fc6c9
2 files changed