The NullAudio backend is guaranteed to be compiled in, so no reason to check it. In addition to that, if it wasn't valid, it wouldn't work as a fallback in InitSoundStream as there are uses to g_sound_stream later.
The NullAudio backend is guaranteed to be compiled in, so no reason to check it. In addition to that, if it wasn't valid, it wouldn't work as a fallback in InitSoundStream as there are uses to g_sound_stream later.