output: use bool for return values and flags

Don't return 0/-1 on success/error, but true/false.  Instead of int,
use bool for storing flags.

1 files changed, 2 insertions, 2 deletions

diff --git a/src/audio.h b/src/audio.h
index 9140afd58..c6f6cbde0 100644
--- a/src/audio.h
+++ b/src/audio.h
@@ -42,9 +42,9 @@ void initAudioDriver(void);
 
 void finishAudioDriver(void);
 
-int openAudioDevice(const struct audio_format *audioFormat);
+bool openAudioDevice(const struct audio_format *audioFormat);
 
-int playAudio(const char *playChunk, size_t size);
+bool playAudio(const char *playChunk, size_t size);
 
 void audio_output_pause_all(void);