don't report an error about not able to open device in audioError

also, update TODO with ideas about non-blocking update

git-svn-id: https://svn.musicpd.org/mpd/trunk@632 09075e82-0dd4-0310-85a5-a0d7c8717e4f

src/audio.c

@@ -194,7 +194,6 @@ void finishAudio() {
 }
 
 void audioError() {
-	ERROR("Error opening audio device\n");
 	if(errno==AO_ENOTLIVE) {
 		ERROR("not a live ao device\n");
 	}