Update test code.

research/miniaudio_engine.c

@@ -79,7 +79,7 @@ int main(int argc, char** argv)
     loadNotification.cb.onSignal = on_sound_loaded;
     loadNotification.pSound = &sound;
 
-    result = ma_sound_init_from_file(&engine, argv[1], MA_DATA_SOURCE_FLAG_DECODE | MA_DATA_SOURCE_FLAG_ASYNC /*| MA_DATA_SOURCE_FLAG_STREAM*/, &group, &baseSound);
+    result = ma_sound_init_from_file(&engine, argv[1], MA_DATA_SOURCE_FLAG_DECODE | MA_DATA_SOURCE_FLAG_ASYNC /*| MA_DATA_SOURCE_FLAG_STREAM*/, &group, NULL, &baseSound);
     if (result != MA_SUCCESS) {
         printf("Failed to load sound: %s\n", argv[1]);
         ma_engine_uninit(&engine);