Remove const for plain data types in common_audio/

BUG=1644
R=tina.legrand@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/1464005

git-svn-id: http://webrtc.googlecode.com/svn/trunk/webrtc@4019 4adac7df-926f-26a2-2b94-8c16560cd09d
diff --git a/common_audio/signal_processing/splitting_filter.c b/common_audio/signal_processing/splitting_filter.c
index e1bd427..6a563cb 100644
--- a/common_audio/signal_processing/splitting_filter.c
+++ b/common_audio/signal_processing/splitting_filter.c
@@ -43,7 +43,7 @@
 //                            |data_length|
 //
 
-void WebRtcSpl_AllPassQMF(int32_t* in_data, const int16_t data_length,
+void WebRtcSpl_AllPassQMF(int32_t* in_data, int16_t data_length,
                           int32_t* out_data, const uint16_t* filter_coefficients,
                           int32_t* filter_state)
 {