Convert channel counts to size_t.

webrtc/modules/audio_coding/neteq/tools/neteq_quality_test.cc

Index: webrtc/modules/audio_coding/neteq/tools/neteq_quality_test.cc
diff --git a/webrtc/modules/audio_coding/neteq/tools/neteq_quality_test.cc b/webrtc/modules/audio_coding/neteq/tools/neteq_quality_test.cc
index f9b0db37d74cf4d9274a48ee46ae781c023e63b0..9c64e0fb4823ecf80a6d4f03e456e3111e369455 100644
--- a/webrtc/modules/audio_coding/neteq/tools/neteq_quality_test.cc
+++ b/webrtc/modules/audio_coding/neteq/tools/neteq_quality_test.cc
@@ -210,7 +210,7 @@ NetEqQualityTest::NetEqQualityTest(int block_duration_ms,
                                    int out_sampling_khz,
                                    NetEqDecoder decoder_type)
     : decoder_type_(decoder_type),
-      channels_(FLAGS_channels),
+      channels_(static_cast<size_t>(FLAGS_channels)),
       decoded_time_ms_(0),
       decodable_time_ms_(0),
       drift_factor_(FLAGS_drift_factor),
@@ -394,7 +394,7 @@ int NetEqQualityTest::Transmit() {
 }
 
 int NetEqQualityTest::DecodeBlock() {
-  int channels;
+  size_t channels;
   size_t samples;
   int ret = neteq_->GetAudio(out_size_samples_ * channels_, &out_data_[0],
                              &samples, &channels, NULL);