Only clamp to 16 kHz when AECM is enabled.

Otherwise we could needlessly downsample to 16 kHz (rather than 32 kHz)
when HW AEC is used.

BUG=3259
R=bjornv@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/13429004

git-svn-id: http://webrtc.googlecode.com/svn/trunk/webrtc@6033 4adac7df-926f-26a2-2b94-8c16560cd09d
2 files changed