Fix debug file buffer bug introduced in r3574.

This correctly uses int16_t rather than float. Only affects the debug
file buffer, not the production code path.

TBR=bjornv

Review URL: https://webrtc-codereview.appspot.com/1162008

git-svn-id: http://webrtc.googlecode.com/svn/trunk/webrtc@3626 4adac7df-926f-26a2-2b94-8c16560cd09d
1 file changed