Ensure capture_levels_ is sized correctly at init time.

Fixes failing voe_auto_test and audioproc_perf.

TBR=bjornv

Review URL: https://webrtc-codereview.appspot.com/6699004

git-svn-id: http://webrtc.googlecode.com/svn/trunk@5348 4adac7df-926f-26a2-2b94-8c16560cd09d
1 file changed