Match existing type usage better.

webrtc/modules/audio_coding/codecs/ilbc/nearest_neighbor.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 24 matching lines @@
   /* Stack based */
   int32_t crit[8];
 
   /* Calculate square distance */
   for(i=0;i<arlength;i++){
     diff=array[i]-value;
     crit[i] = diff * diff;
   }
 
   /* Find the minimum square distance */
-  *index=WebRtcSpl_MinIndexW32(crit, (int16_t)arlength);
+  *index=WebRtcSpl_MinIndexW32(crit, arlength);
 }