Update audio code to use size_t more correctly,

webrtc/modules/audio_processing/vad/pole_zero_filter.h

 /*
  *  Copyright (c) 2012 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_PROCESSING_VAD_POLE_ZERO_FILTER_H_
 #define WEBRTC_MODULES_AUDIO_PROCESSING_VAD_POLE_ZERO_FILTER_H_
 
+#include <cstddef>
+
 #include "webrtc/typedefs.h"
 
 namespace webrtc {
 
 class PoleZeroFilter {
  public:
   ~PoleZeroFilter() {}
 
   static PoleZeroFilter* Create(const float* numerator_coefficients,
-                                int order_numerator,
+                                size_t order_numerator,
                                 const float* denominator_coefficients,
-                                int order_denominator);
+                                size_t order_denominator);
 
-  int Filter(const int16_t* in, int num_input_samples, float* output);
+  int Filter(const int16_t* in, size_t num_input_samples, float* output);
 
  private:
   PoleZeroFilter(const float* numerator_coefficients,
-                 int order_numerator,
+                 size_t order_numerator,
                  const float* denominator_coefficients,
-                 int order_denominator);
+                 size_t order_denominator);
 
   static const int kMaxFilterOrder = 24;
 
   int16_t past_input_[kMaxFilterOrder * 2];
   float past_output_[kMaxFilterOrder * 2];
 
   float numerator_coefficients_[kMaxFilterOrder + 1];
   float denominator_coefficients_[kMaxFilterOrder + 1];
 
-  int order_numerator_;
-  int order_denominator_;
-  int highest_order_;
+  size_t order_numerator_;
+  size_t order_denominator_;
+  size_t highest_order_;
 };
 
 }  // namespace webrtc
 
 #endif  // WEBRTC_MODULES_AUDIO_PROCESSING_VAD_POLE_ZERO_FILTER_H_