Update audio code to use size_t more correctly,

webrtc/modules/audio_coding/codecs/ilbc/init_encode.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 49 matching lines @@
   /* Set the filter state of the HP filter to 0 */
   WebRtcSpl_MemSetW16(iLBCenc_inst->hpimemx, 0, 2);
   WebRtcSpl_MemSetW16(iLBCenc_inst->hpimemy, 0, 4);
 
 #ifdef SPLIT_10MS
   /*Zeroing the past samples for 10msec Split*/
   WebRtcSpl_MemSetW16(iLBCenc_inst->past_samples,0,160);
   iLBCenc_inst->section = 0;
 #endif
 
-  return (iLBCenc_inst->no_of_bytes);
+  return (int)(iLBCenc_inst->no_of_bytes);
 }