Update audio code to use size_t more correctly,

webrtc/common_audio/signal_processing/energy.c

Index: webrtc/common_audio/signal_processing/energy.c
diff --git a/webrtc/common_audio/signal_processing/energy.c b/webrtc/common_audio/signal_processing/energy.c
index 1d1ed6284537b91bed323c9f8aa98c43d55eda5e..e83f1a698f609e95eba8a0fc399d03d8c218174d 100644
--- a/webrtc/common_audio/signal_processing/energy.c
+++ b/webrtc/common_audio/signal_processing/energy.c
@@ -17,13 +17,15 @@
 
 #include "webrtc/common_audio/signal_processing/include/signal_processing_library.h"
 
-int32_t WebRtcSpl_Energy(int16_t* vector, int vector_length, int* scale_factor)
+int32_t WebRtcSpl_Energy(int16_t* vector,
+                         size_t vector_length,
+                         int* scale_factor)
 {
     int32_t en = 0;
-    int i;
+    size_t i;
     int scaling =
         WebRtcSpl_GetScalingSquare(vector, vector_length, vector_length);
-    int looptimes = vector_length;
+    size_t looptimes = vector_length;
     int16_t *vectorptr = vector;
 
     for (i = 0; i < looptimes; i++)