mixer: explicitly close all mixers on shutdown

NEWS

@@ -3,6 +3,7 @@ ver 0.15.7 (2009/??/??)
   - id3: fix ID3v1 charset conversion
 * decoders:
   - ffmpeg: don't try to force stereo
+* mixer: explicitly close all mixers on shutdown
 * mapper: fix memory leak when playlist_directory is not set
 * mapper: apply filesystem_charset to playlists
 * command: verify playlist name in the "rm" command

src/mixer_control.c

@@ -62,6 +62,10 @@ mixer_free(struct mixer *mixer)
 	assert(mixer->plugin != NULL);
 	assert(mixer->mutex != NULL);
 
+	/* mixers with the "global" flag set might still be open at
+	   this point (see mixer_auto_close()) */
+	mixer_close(mixer);
+
 	g_mutex_free(mixer->mutex);
 
 	mixer->plugin->finish(mixer);