Update audio code to use size_t more correctly,

webrtc/modules/audio_coding/codecs/isac/main/source/pitch_estimator.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 43 matching lines @@
 
 void WebRtcIsac_PitchfilterPre_gains(double *indat,
                                      double *outdat,
                                      double out_dG[][PITCH_FRAME_LEN + QLOOKAHEAD],
                                      PitchFiltstr *pfp,
                                      double *lags,
                                      double *gains);
 
 void WebRtcIsac_WeightingFilter(const double *in, double *weiout, double *whiout, WeightFiltstr *wfdata);
 
-void WebRtcIsac_Highpass(const double *in, double *out, double *state, int N);
+void WebRtcIsac_Highpass(const double *in,
+                         double *out,
+                         double *state,
+                         size_t N);
 
 void WebRtcIsac_DecimateAllpass(const double *in,
-                                double *state_in,        /* array of size: 2*ALLPASSSECTIONS+1 */
-                                int N,                   /* number of input samples */
-                                double *out);            /* array of size N/2 */
+                                double *state_in,  /* array of size:
+                                                    *     2*ALLPASSSECTIONS+1 */
+                                size_t N,          /* number of input samples */
+                                double *out);      /* array of size N/2 */
 
 #endif /* WEBRTC_MODULES_AUDIO_CODING_CODECS_ISAC_MAIN_SOURCE_PITCH_ESTIMATOR_H_ */