Update audio code to use size_t more correctly,

webrtc/common_audio/signal_processing/vector_scaling_operations.c

Index: webrtc/common_audio/signal_processing/vector_scaling_operations.c
diff --git a/webrtc/common_audio/signal_processing/vector_scaling_operations.c b/webrtc/common_audio/signal_processing/vector_scaling_operations.c
index 9ae7480eb781178408136ebbd6120f7229ddef55..fdefd0676079ad0ec409aa589ea459bb7afdc85e 100644
--- a/webrtc/common_audio/signal_processing/vector_scaling_operations.c
+++ b/webrtc/common_audio/signal_processing/vector_scaling_operations.c
@@ -22,10 +22,10 @@
 
 #include "webrtc/common_audio/signal_processing/include/signal_processing_library.h"
 
-void WebRtcSpl_VectorBitShiftW16(int16_t *res, int16_t length,
+void WebRtcSpl_VectorBitShiftW16(int16_t *res, size_t length,
                                  const int16_t *in, int16_t right_shifts)
 {
-    int i;
+    size_t i;
 
     if (right_shifts > 0)
     {
@@ -43,11 +43,11 @@ void WebRtcSpl_VectorBitShiftW16(int16_t *res, int16_t length,
 }
 
 void WebRtcSpl_VectorBitShiftW32(int32_t *out_vector,
-                                 int16_t vector_length,
+                                 size_t vector_length,
                                  const int32_t *in_vector,
                                  int16_t right_shifts)
 {
-    int i;
+    size_t i;
 
     if (right_shifts > 0)
     {
@@ -64,9 +64,9 @@ void WebRtcSpl_VectorBitShiftW32(int32_t *out_vector,
     }
 }
 
-void WebRtcSpl_VectorBitShiftW32ToW16(int16_t* out, int length,
+void WebRtcSpl_VectorBitShiftW32ToW16(int16_t* out, size_t length,
                                       const int32_t* in, int right_shifts) {
-  int i;
+  size_t i;
   int32_t tmp_w32;
 
   if (right_shifts >= 0) {
@@ -84,11 +84,11 @@ void WebRtcSpl_VectorBitShiftW32ToW16(int16_t* out, int length,
 }
 
 void WebRtcSpl_ScaleVector(const int16_t *in_vector, int16_t *out_vector,
-                           int16_t gain, int16_t in_vector_length,
+                           int16_t gain, size_t in_vector_length,
                            int16_t right_shifts)
 {
     // Performs vector operation: out_vector = (gain*in_vector)>>right_shifts
-    int i;
+    size_t i;
     const int16_t *inptr;
     int16_t *outptr;
 
@@ -102,11 +102,11 @@ void WebRtcSpl_ScaleVector(const int16_t *in_vector, int16_t *out_vector,
 }
 
 void WebRtcSpl_ScaleVectorWithSat(const int16_t *in_vector, int16_t *out_vector,
-                                 int16_t gain, int16_t in_vector_length,
+                                 int16_t gain, size_t in_vector_length,
                                  int16_t right_shifts)
 {
     // Performs vector operation: out_vector = (gain*in_vector)>>right_shifts
-    int i;
+    size_t i;
     const int16_t *inptr;
     int16_t *outptr;
 
@@ -120,10 +120,10 @@ void WebRtcSpl_ScaleVectorWithSat(const int16_t *in_vector, int16_t *out_vector,
 
 void WebRtcSpl_ScaleAndAddVectors(const int16_t *in1, int16_t gain1, int shift1,
                                   const int16_t *in2, int16_t gain2, int shift2,
-                                  int16_t *out, int vector_length)
+                                  int16_t *out, size_t vector_length)
 {
     // Performs vector operation: out = (gain1*in1)>>shift1 + (gain2*in2)>>shift2
-    int i;
+    size_t i;
     const int16_t *in1ptr;
     const int16_t *in2ptr;
     int16_t *outptr;
@@ -146,12 +146,12 @@ int WebRtcSpl_ScaleAndAddVectorsWithRoundC(const int16_t* in_vector1,
                                            int16_t in_vector2_scale,
                                            int right_shifts,
                                            int16_t* out_vector,
-                                           int length) {
-  int i = 0;
+                                           size_t length) {
+  size_t i = 0;
   int round_value = (1 << right_shifts) >> 1;
 
   if (in_vector1 == NULL || in_vector2 == NULL || out_vector == NULL ||
-      length <= 0 || right_shifts < 0) {
+      length == 0 || right_shifts < 0) {
     return -1;
   }