libsaria: Save idl_task to filename

This was hardcoded to "queue.q"

Signed-off-by: Bryan Schumaker <bjschuma@gmail.com>

libsaria/playlist/file.cpp

@@ -47,7 +47,7 @@ namespace libsaria
 
 	void Playlist::do_save()
 	{
-		OutFile out("queue.q");
+		OutFile out(filename);
 		list<Track *>::iterator it;
 
 		out << plist.size() << "\n";