Convert some more things to size_t.

webrtc/common_audio/signal_processing/min_max_operations_neon.c

Index: webrtc/common_audio/signal_processing/min_max_operations_neon.c
diff --git a/webrtc/common_audio/signal_processing/min_max_operations_neon.c b/webrtc/common_audio/signal_processing/min_max_operations_neon.c
index ee8bef1a9c2294691876fcee8169cc80b82a6bfe..6fbbf94ee052092273578b032819953941304eca 100644
--- a/webrtc/common_audio/signal_processing/min_max_operations_neon.c
+++ b/webrtc/common_audio/signal_processing/min_max_operations_neon.c
@@ -9,6 +9,7 @@
  */
 
 #include <arm_neon.h>
+#include <assert.h>
 #include <stdlib.h>
 
 #include "webrtc/common_audio/signal_processing/include/signal_processing_library.h"
@@ -17,9 +18,7 @@
 int16_t WebRtcSpl_MaxAbsValueW16Neon(const int16_t* vector, size_t length) {
   int absolute = 0, maximum = 0;
 
-  if (vector == NULL || length == 0) {
-    return -1;
-  }
+  assert(length > 0);
 
   const int16_t* p_start = vector;
   size_t rest = length & 7;
@@ -77,9 +76,7 @@ int32_t WebRtcSpl_MaxAbsValueW32Neon(const int32_t* vector, size_t length) {
   size_t i = 0;
   size_t residual = length & 0x7;
 
-  if (vector == NULL || length == 0) {
-    return -1;
-  }
+  assert(length > 0);
 
   const int32_t* p_start = vector;
   uint32x4_t max32x4_0 = vdupq_n_u32(0);
@@ -131,9 +128,7 @@ int16_t WebRtcSpl_MaxValueW16Neon(const int16_t* vector, size_t length) {
   size_t i = 0;
   size_t residual = length & 0x7;
 
-  if (vector == NULL || length == 0) {
-    return maximum;
-  }
+  assert(length > 0);
 
   const int16_t* p_start = vector;
   int16x8_t max16x8 = vdupq_n_s16(WEBRTC_SPL_WORD16_MIN);
@@ -171,9 +166,7 @@ int32_t WebRtcSpl_MaxValueW32Neon(const int32_t* vector, size_t length) {
   size_t i = 0;
   size_t residual = length & 0x7;
 
-  if (vector == NULL || length == 0) {
-    return maximum;
-  }
+  assert(length > 0);
 
   const int32_t* p_start = vector;
   int32x4_t max32x4_0 = vdupq_n_s32(WEBRTC_SPL_WORD32_MIN);
@@ -215,9 +208,7 @@ int16_t WebRtcSpl_MinValueW16Neon(const int16_t* vector, size_t length) {
   size_t i = 0;
   size_t residual = length & 0x7;
 
-  if (vector == NULL || length == 0) {
-    return minimum;
-  }
+  assert(length > 0);
 
   const int16_t* p_start = vector;
   int16x8_t min16x8 = vdupq_n_s16(WEBRTC_SPL_WORD16_MAX);
@@ -255,9 +246,7 @@ int32_t WebRtcSpl_MinValueW32Neon(const int32_t* vector, size_t length) {
   size_t i = 0;
   size_t residual = length & 0x7;
 
-  if (vector == NULL || length == 0) {
-    return minimum;
-  }
+  assert(length > 0);
 
   const int32_t* p_start = vector;
   int32x4_t min32x4_0 = vdupq_n_s32(WEBRTC_SPL_WORD32_MAX);