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

webrtc/modules/audio_coding/codecs/ilbc/do_plc.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 15 matching lines @@
  *  and LP parameters. If no packet loss, update state.
  *---------------------------------------------------------------*/
 
 void WebRtcIlbcfix_DoThePlc(
     int16_t *PLCresidual,  /* (o) concealed residual */
     int16_t *PLClpc,    /* (o) concealed LP parameters */
     int16_t PLI,     /* (i) packet loss indicator
                                                            0 - no PL, 1 = PL */
     int16_t *decresidual,  /* (i) decoded residual */
     int16_t *lpc,    /* (i) decoded LPC (only used for no PL) */
-    int16_t inlag,    /* (i) pitch lag */
+    size_t inlag,    /* (i) pitch lag */
     IlbcDecoder *iLBCdec_inst
     /* (i/o) decoder instance */
                             );
 
 #endif