output: join the output thread after sending the KILL command

src/output_control.c

@@ -134,8 +134,12 @@ void audio_output_close(struct audio_output *audioOutput)
 void audio_output_finish(struct audio_output *audioOutput)
 {
 	audio_output_close(audioOutput);
-	if (audioOutput->thread != NULL)
+
+	if (audioOutput->thread != NULL) {
 		ao_command(audioOutput, AO_COMMAND_KILL);
+		g_thread_join(audioOutput->thread);
+	}
+
 	if (audioOutput->plugin->finish)
 		audioOutput->plugin->finish(audioOutput->data);
 	if (audioOutput->convBuffer)

src/output_thread.c

@@ -175,6 +175,6 @@ void audio_output_thread_start(struct audio_output *ao)
 
 	assert(ao->command == AO_COMMAND_NONE);
 
-	if (!(ao->thread = g_thread_create(audio_output_task, ao, FALSE, &e)))
+	if (!(ao->thread = g_thread_create(audio_output_task, ao, true, &e)))
 		g_error("Failed to spawn output task: %s\n", e->message);
 }