Added buffer length when calling encrypt(). Write the extra two bytes.

BUG=934
TEST=Run VoE Autotest Encryption with Valgrind.
Review URL: https://webrtc-codereview.appspot.com/930004

git-svn-id: http://webrtc.googlecode.com/svn/trunk/webrtc@2995 4adac7df-926f-26a2-2b94-8c16560cd09d
2 files changed