Convert channel counts to size_t.

webrtc/modules/audio_coding/codecs/opus/opus_fec_test.cc

Index: webrtc/modules/audio_coding/codecs/opus/opus_fec_test.cc
diff --git a/webrtc/modules/audio_coding/codecs/opus/opus_fec_test.cc b/webrtc/modules/audio_coding/codecs/opus/opus_fec_test.cc
index cb895a5d9d071f8e3a92ce6e0c1c56d3f9d0839b..4f9f7ff7bb0bcb0ff2ad645acd169edaf5d6cb9e 100644
--- a/webrtc/modules/audio_coding/codecs/opus/opus_fec_test.cc
+++ b/webrtc/modules/audio_coding/codecs/opus/opus_fec_test.cc
@@ -9,6 +9,7 @@
  */
 
 #include "testing/gtest/include/gtest/gtest.h"
+#include "webrtc/base/format_macros.h"
 #include "webrtc/base/scoped_ptr.h"
 #include "webrtc/modules/audio_coding/codecs/opus/opus_interface.h"
 #include "webrtc/test/testsupport/fileutils.h"
@@ -21,7 +22,7 @@ using ::testing::TestWithParam;
 namespace webrtc {
 
 // Define coding parameter as <channels, bit_rate, filename, extension>.
-typedef tuple<int, int, string, string> coding_param;
+typedef tuple<size_t, int, string, string> coding_param;
 typedef struct mode mode;
 
 struct mode {
@@ -47,7 +48,7 @@ class OpusFecTest : public TestWithParam<coding_param> {
   int sampling_khz_;
   size_t block_length_sample_;
 
-  int channels_;
+  size_t channels_;
   int bit_rate_;
 
   size_t data_pointer_;
@@ -68,7 +69,7 @@ class OpusFecTest : public TestWithParam<coding_param> {
 void OpusFecTest::SetUp() {
   channels_ = get<0>(GetParam());
   bit_rate_ = get<1>(GetParam());
-  printf("Coding %d channel signal at %d bps.\n", channels_, bit_rate_);
+  printf("Coding %" PRIuS " channel signal at %d bps.\n", channels_, bit_rate_);
 
   in_filename_ = test::ResourcePath(get<2>(GetParam()), get<3>(GetParam()));