Update audio code to use size_t more correctly,

webrtc/modules/audio_coding/codecs/ilbc/xcorr_coef.c

 /*
  *  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.
  */
 
 /******************************************************************
 
  iLBC Speech Coder ANSI-C Source Code
 
  WebRtcIlbcfix_XcorrCoef.c
 
 ******************************************************************/
 
 #include "defines.h"
 
 /*----------------------------------------------------------------*
  * cross correlation which finds the optimal lag for the
  * crossCorr*crossCorr/(energy) criteria
  *---------------------------------------------------------------*/
 
-int WebRtcIlbcfix_XcorrCoef(
+size_t WebRtcIlbcfix_XcorrCoef(
     int16_t *target,  /* (i) first array */
     int16_t *regressor, /* (i) second array */
-    int16_t subl,  /* (i) dimension arrays */
-    int16_t searchLen, /* (i) the search lenght */
-    int16_t offset,  /* (i) samples offset between arrays */
+    size_t subl,  /* (i) dimension arrays */
+    size_t searchLen, /* (i) the search lenght */
+    size_t offset,  /* (i) samples offset between arrays */
     int16_t step   /* (i) +1 or -1 */
                             ){
-  int k;
-  int16_t maxlag;
+  size_t k;
+  size_t maxlag;
   int16_t pos;
   int16_t max;
   int16_t crossCorrScale, Energyscale;
   int16_t crossCorrSqMod, crossCorrSqMod_Max;
   int32_t crossCorr, Energy;
   int16_t crossCorrmod, EnergyMod, EnergyMod_Max;
   int16_t *tp, *rp;
   int16_t *rp_beg, *rp_end;
   int16_t totscale, totscale_max;
   int16_t scalediff;
@@ skipping 85 matching lines @@
     pos+=step;
 
     /* Do a +/- to get the next energy */
     Energy += step * ((*rp_end * *rp_end - *rp_beg * *rp_beg) >> shifts);
     rp_beg+=step;
     rp_end+=step;
   }
 
   return(maxlag+offset);
 }