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-rw-r--r--src/output_thread.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/src/output_thread.c b/src/output_thread.c
index 4209f2266..45acdd55f 100644
--- a/src/output_thread.c
+++ b/src/output_thread.c
@@ -65,6 +65,8 @@ static void ao_play(struct audio_output *ao)
size_t size = ao->args.play.size;
bool ret;
+ assert(size > 0);
+
if (!audio_format_equals(&ao->inAudioFormat, &ao->outAudioFormat))
convertAudioFormat(ao, &data, &size);