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

webrtc/modules/audio_coding/codecs/ilbc/simple_lpc_analysis.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.
  */
 
@@ skipping 16 matching lines @@
  *---------------------------------------------------------------*/
 
 void WebRtcIlbcfix_SimpleLpcAnalysis(
     int16_t *lsf,   /* (o) lsf coefficients */
     int16_t *data,   /* (i) new block of speech */
     IlbcEncoder *iLBCenc_inst
     /* (i/o) the encoder state structure */
                                      ) {
   int k;
   int scale;
-  int16_t is;
+  size_t is;
   int16_t stability;
   /* Stack based */
   int16_t A[LPC_FILTERORDER + 1];
   int32_t R[LPC_FILTERORDER + 1];
   int16_t windowedData[BLOCKL_MAX];
   int16_t rc[LPC_FILTERORDER];
 
   is=LPC_LOOKBACK+BLOCKL_MAX-iLBCenc_inst->blockl;
   WEBRTC_SPL_MEMCPY_W16(iLBCenc_inst->lpc_buffer+is,data,iLBCenc_inst->blockl);
 
@@ skipping 37 matching lines @@
     /* Convert from A to LSF representation */
     WebRtcIlbcfix_Poly2Lsf(lsf + k*LPC_FILTERORDER, A);
   }
 
   is=LPC_LOOKBACK+BLOCKL_MAX-iLBCenc_inst->blockl;
   WEBRTC_SPL_MEMCPY_W16(iLBCenc_inst->lpc_buffer,
                         iLBCenc_inst->lpc_buffer+LPC_LOOKBACK+BLOCKL_MAX-is, is);
 
   return;
 }