Update audio code to use size_t more correctly, webrtc/modules/ portion.

webrtc/modules/audio_conference_mixer/source/level_indicator.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.
  */
 
 #ifndef WEBRTC_MODULES_AUDIO_CONFERENCE_MIXER_SOURCE_LEVEL_INDICATOR_H_
 #define WEBRTC_MODULES_AUDIO_CONFERENCE_MIXER_SOURCE_LEVEL_INDICATOR_H_
 
+#include <stddef.h>
+
 #include "webrtc/typedefs.h"
 
 namespace webrtc {
 class LevelIndicator
 {
 public:
     enum{TICKS_BEFORE_CALCULATION = 10};
 
     LevelIndicator();
     ~LevelIndicator();
 
     // Updates the level.
     void ComputeLevel(const int16_t* speech,
-                      const uint16_t nrOfSamples);
+                      const size_t nrOfSamples);
 
     int32_t GetLevel();
 private:
     int32_t  _max;
     uint32_t _count;
     uint32_t _currentLevel;
 };
 }  // namespace webrtc
 
 #endif // WEBRTC_MODULES_AUDIO_CONFERENCE_MIXER_SOURCE_LEVEL_INDICATOR_H_