Merge tag 'v0.18.13'

src/output/plugins/OssOutputPlugin.cxx

@@ -724,6 +724,8 @@ oss_output_play(AudioOutput *ao, const void *chunk, size_t size,
 	OssOutput *od = (OssOutput *)ao;
 	ssize_t ret;
 
+	assert(size > 0);
+
 	/* reopen the device since it was closed by dropBufferedAudio */
 	if (od->fd < 0 && !oss_reopen(od, error))
 		return 0;
@@ -734,6 +736,8 @@ oss_output_play(AudioOutput *ao, const void *chunk, size_t size,
 	size = e.size;
 #endif
 
+	assert(size > 0);
+
 	while (true) {
 		ret = write(od->fd, chunk, size);
 		if (ret > 0) {