hello-oboe: use int32_t for channelCount
diff --git a/samples/hello-oboe/src/main/cpp/PlayAudioEngine.cpp b/samples/hello-oboe/src/main/cpp/PlayAudioEngine.cpp
index ef84638..5a766cc 100644
--- a/samples/hello-oboe/src/main/cpp/PlayAudioEngine.cpp
+++ b/samples/hello-oboe/src/main/cpp/PlayAudioEngine.cpp
@@ -72,7 +72,7 @@
         mSampleRate = mPlayStream->getSampleRate();
         mFramesPerBurst = mPlayStream->getFramesPerBurst();
 
-        int channelCount = mPlayStream->getChannelCount();
+        int32_t channelCount = mPlayStream->getChannelCount();
         if (channelCount != mChannelCount){
             LOGW("Requested %d channels but received %d", mChannelCount, channelCount);
         }