Game spams "Track 0" a lot, causes repeated unnecessary requests to the MSU-1.

FF6 has a tendency to spam requests for "track 0" a lot, sometimes repeatedly in a row. Since this is silence, we don't handle it, and it doesn't cause any particular bug to not do so because we don't have a track for it, but it does cause a lot of unnecessary requests to the MSU-1, which may I suppose cause some unnecessary storage wear (from repeated directory lookups) etc.