Revert "Upconvert various types to int."

webrtc/common_audio/signal_processing/cross_correlation.c

 /*
  *  Copyright (c) 2012 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.
  */
 
 #include "webrtc/common_audio/signal_processing/include/signal_processing_library.h"
 
 /* C version of WebRtcSpl_CrossCorrelation() for generic platforms. */
 void WebRtcSpl_CrossCorrelationC(int32_t* cross_correlation,
                                  const int16_t* seq1,
                                  const int16_t* seq2,
                                  int16_t dim_seq,
                                  int16_t dim_cross_correlation,
-                                 int right_shifts,
-                                 int step_seq2) {
+                                 int16_t right_shifts,
+                                 int16_t step_seq2) {
   int i = 0, j = 0;
 
   for (i = 0; i < dim_cross_correlation; i++) {
     *cross_correlation = 0;
     /* Unrolling doesn't seem to improve performance. */
     for (j = 0; j < dim_seq; j++) {
       *cross_correlation += (seq1[j] * seq2[step_seq2 * i + j]) >> right_shifts;
     }
     cross_correlation++;
   }
 }