Added buffer length when calling encrypt/decrypt. Write the extra two bytes.

Replacing http://review.webrtc.org/893004/.

BUG=934
TEST=Run ViE Autotest Encryption with Valgrind.

Review URL: https://webrtc-codereview.appspot.com/901006

git-svn-id: http://webrtc.googlecode.com/svn/trunk/src@2938 4adac7df-926f-26a2-2b94-8c16560cd09d
3 files changed