Update audio code to use size_t more correctly,

webrtc/common_audio/signal_processing/auto_correlation.c

Index: webrtc/common_audio/signal_processing/auto_correlation.c
diff --git a/webrtc/common_audio/signal_processing/auto_correlation.c b/webrtc/common_audio/signal_processing/auto_correlation.c
index 405a08ecaff527f329e66abd49fbf2155d636e7c..8d6c879ca77986ffdc30a0a28a7c23f3e6bc4346 100644
--- a/webrtc/common_audio/signal_processing/auto_correlation.c
+++ b/webrtc/common_audio/signal_processing/auto_correlation.c
@@ -11,20 +11,18 @@
 #include "webrtc/common_audio/signal_processing/include/signal_processing_library.h"
 
 int WebRtcSpl_AutoCorrelation(const int16_t* in_vector,
-                              int in_vector_length,
-                              int order,
+                              size_t in_vector_length,
+                              size_t order,
                               int32_t* result,
                               int* scale) {
   int32_t sum = 0;
-  int i = 0, j = 0;
+  size_t i = 0, j = 0;
   int16_t smax = 0;
   int scaling = 0;
 
   if (order > in_vector_length) {

[Andrew MacDonald, 2015/07/22 19:54:58]

assert this instead and return a size_t?

     /* Undefined */
     return -1;
-  } else if (order < 0) {
-    order = in_vector_length;
   }
 
   // Find the maximum absolute value of the samples.
@@ -64,5 +62,5 @@ int WebRtcSpl_AutoCorrelation(const int16_t* in_vector,
   }
 
   *scale = scaling;
-  return order + 1;
+  return (int)(order + 1);
 }