WebRtc_Word32 -> int32_t in audio_processing/

BUG=314

Review URL: https://webrtc-codereview.appspot.com/1307004

git-svn-id: http://webrtc.googlecode.com/svn/trunk@3809 4adac7df-926f-26a2-2b94-8c16560cd09d
diff --git a/webrtc/modules/audio_processing/voice_detection_impl.cc b/webrtc/modules/audio_processing/voice_detection_impl.cc
index 50b99a0..8a505ef 100644
--- a/webrtc/modules/audio_processing/voice_detection_impl.cc
+++ b/webrtc/modules/audio_processing/voice_detection_impl.cc
@@ -61,7 +61,7 @@
   }
   assert(audio->samples_per_split_channel() <= 160);
 
-  WebRtc_Word16* mixed_data = audio->low_pass_split_data(0);
+  int16_t* mixed_data = audio->low_pass_split_data(0);
   if (audio->num_channels() > 1) {
     audio->CopyAndMixLowPass(1);
     mixed_data = audio->mixed_low_pass_data(0);