Initialize bitrates in ValidateCodecFormat.

Attempt to un-break a Visual Studio build (unknown version) that
incorrectly reports that these are potentially uninitialized.

BUG=
R=henrike@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/15469005

git-svn-id: http://webrtc.googlecode.com/svn/trunk@6108 4adac7df-926f-26a2-2b94-8c16560cd09d
Rollback of r6108

BUG=N/A
R=mallinath@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/17469004

git-svn-id: http://webrtc.googlecode.com/svn/trunk@6109 4adac7df-926f-26a2-2b94-8c16560cd09d
(Auto)update libjingle 66798415-> 66813165

git-svn-id: http://webrtc.googlecode.com/svn/trunk@6110 4adac7df-926f-26a2-2b94-8c16560cd09d