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

TODO

@@ -4,11 +4,7 @@
 	c) fork on update
 	d) have a special case where if a update is in a command list, it only forks at the beginning of the list, and writes at the end of the command list
 	e) add an element to status stating the "update state"
-	f) before a fork, the parent gets the position at the end of the db file
-	g) update child will dump changes to end of db file, this can effectively be a journal
-	h) parent reads changes at end of db file when update child is done
-	i) when mpd exits, dump the current db to the file, this will erase an journal entries
-	j) if there are journal entries on mpd start up, read the changes, then dump the entired db back to disk, and elimanate journal entries
-
+	f) store stuff to updated in a linked list prior to update fork
+	g) pass changes back through a pipe from child to parent
 
 2) rewrite interface stuff, specifically command list handling etc so its less of a hack and deals with the above update stuff better

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");
 	}