NetEq4: Removing templatization for AudioVector

This is the last CL for removing templates in Audio(Multi)Vector.

BUG=1363
R=turaj@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/2341004

git-svn-id: http://webrtc.googlecode.com/svn/trunk@4960 4adac7df-926f-26a2-2b94-8c16560cd09d
diff --git a/webrtc/modules/audio_coding/neteq4/sync_buffer.h b/webrtc/modules/audio_coding/neteq4/sync_buffer.h
index cfd35fc..e1e5daf 100644
--- a/webrtc/modules/audio_coding/neteq4/sync_buffer.h
+++ b/webrtc/modules/audio_coding/neteq4/sync_buffer.h
@@ -78,7 +78,7 @@
   // created.
   void Flush();
 
-  const AudioVector<int16_t>& Channel(size_t n) { return *channels_[n]; }
+  const AudioVector& Channel(size_t n) { return *channels_[n]; }
 
   // Accessors and mutators.
   size_t next_index() const { return next_index_; }