Update a ton of audio code to use size_t more correctly and in general reduce

webrtc/modules/audio_coding/codecs/ilbc/hp_output.h

 /*
  *  Copyright (c) 2011 The WebRTC project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
@@ skipping 11 matching lines @@
 #include "defines.h"
 
 void WebRtcIlbcfix_HpOutput(
     int16_t *signal,     /* (i/o) signal vector */
     int16_t *ba,      /* (i)   B- and A-coefficients (2:nd order)
                                {b[0] b[1] b[2] -a[1] -a[2]} a[0]
                                is assumed to be 1.0 */
     int16_t *y,      /* (i/o) Filter state yhi[n-1] ylow[n-1]
                               yhi[n-2] ylow[n-2] */
     int16_t *x,      /* (i/o) Filter state x[n-1] x[n-2] */
-    int16_t len);      /* (i)   Number of samples to filter */
+    size_t len);      /* (i)   Number of samples to filter */
 
 #endif