Race condition in RTPSender::UpdateRtpStats

The ssrc should not be access directly from the ssrc_ field, without
holding the send_critsect_ lock. A better way is to just use the SSRC()
getter method.

BUG=
R=pbos@webrtc.org, stefan@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/7539006

git-svn-id: http://webrtc.googlecode.com/svn/trunk/webrtc@5439 4adac7df-926f-26a2-2b94-8c16560cd09d
1 file changed