Reland "Upconvert various types to int.", ilbc portion.

webrtc/modules/audio_coding/codecs/ilbc/init_decode.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.
  */
 
 /******************************************************************
 
  iLBC Speech Coder ANSI-C Source Code
 
  WebRtcIlbcfix_InitDecode.h
 
 ******************************************************************/
 
 #ifndef WEBRTC_MODULES_AUDIO_CODING_CODECS_ILBC_MAIN_SOURCE_INIT_DECODE_H_
 #define WEBRTC_MODULES_AUDIO_CODING_CODECS_ILBC_MAIN_SOURCE_INIT_DECODE_H_
 
 #include "defines.h"
 
 /*----------------------------------------------------------------*
  *  Initiation of decoder instance.
  *---------------------------------------------------------------*/
 
-int16_t WebRtcIlbcfix_InitDecode(  /* (o) Number of decoded samples */
+int WebRtcIlbcfix_InitDecode(  /* (o) Number of decoded samples */
     IlbcDecoder *iLBCdec_inst, /* (i/o) Decoder instance */
     int16_t mode,     /* (i) frame size mode */
     int use_enhancer           /* (i) 1 to use enhancer
                                   0 to run without enhancer */
                                          );
 
 #endif