Update audio code to use size_t more correctly, webrtc/common_audio/ portion.

webrtc/common_audio/vad/webrtc_vad.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.
  */
 
@@ skipping 38 matching lines @@
     return -1;
   }
   if (self->init_flag != kInitCheck) {
     return -1;
   }
 
   return WebRtcVad_set_mode_core(self, mode);
 }
 
 int WebRtcVad_Process(VadInst* handle, int fs, const int16_t* audio_frame,
-                      int frame_length) {
+                      size_t frame_length) {
   int vad = -1;
   VadInstT* self = (VadInstT*) handle;
 
   if (handle == NULL) {
     return -1;
   }
 
   if (self->init_flag != kInitCheck) {
     return -1;
   }
@@ skipping 13 matching lines @@
   } else if (fs == 8000) {
     vad = WebRtcVad_CalcVad8khz(self, audio_frame, frame_length);
   }
 
   if (vad > 0) {
     vad = 1;
   }
   return vad;
 }
 
-int WebRtcVad_ValidRateAndFrameLength(int rate, int frame_length) {
+int WebRtcVad_ValidRateAndFrameLength(int rate, size_t frame_length) {
   int return_value = -1;
   size_t i;
   int valid_length_ms;
-  int valid_length;
+  size_t valid_length;
 
   // We only allow 10, 20 or 30 ms frames. Loop through valid frame rates and
   // see if we have a matching pair.
   for (i = 0; i < kRatesSize; i++) {
     if (kValidRates[i] == rate) {
       for (valid_length_ms = 10; valid_length_ms <= kMaxFrameLengthMs;
           valid_length_ms += 10) {
-        valid_length = (kValidRates[i] / 1000 * valid_length_ms);
+        valid_length = (size_t)(kValidRates[i] / 1000 * valid_length_ms);
         if (frame_length == valid_length) {
           return_value = 0;
           break;
         }
       }
       break;
     }
   }
 
   return return_value;
 }