Revert "Upconvert various types to int."

webrtc/modules/audio_coding/codecs/isac/main/source/crc.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 62 matching lines @@
  *  - bitstream              : payload bitstream
  *  - len_bitstream_in_bytes : number of 8-bit words in the bit stream
  *
  * Output:
  *  - crc                    : checksum
  *
  * Return value              :  0 - Ok
  *                             -1 - Error
  */
 
-int WebRtcIsac_GetCrc(const int16_t* bitstream,
-                      int len_bitstream_in_bytes,
-                      uint32_t* crc)
+int16_t WebRtcIsac_GetCrc(const int16_t* bitstream,
+                          int16_t        len_bitstream_in_bytes,
+                          uint32_t*      crc)
 {
   uint8_t* bitstream_ptr_uw8;
   uint32_t crc_state;
   int byte_cntr;
   int crc_tbl_indx;
 
   /* Sanity Check. */
   if (bitstream == NULL) {
     return -1;
   }
   /* cast to UWord8 pointer */
   bitstream_ptr_uw8 = (uint8_t *)bitstream;
 
   /* initialize */
   crc_state = 0xFFFFFFFF;
 
   for (byte_cntr = 0; byte_cntr < len_bitstream_in_bytes; byte_cntr++) {
     crc_tbl_indx = (WEBRTC_SPL_RSHIFT_U32(crc_state, 24) ^
                        bitstream_ptr_uw8[byte_cntr]) & 0xFF;
     crc_state = (crc_state << 8) ^ kCrcTable[crc_tbl_indx];
   }
 
   *crc = ~crc_state;
   return 0;
 }