[FE7/FE8] Fix for getting the full 8 instruments in songs

[1:53:31 AM] No-Bark Noonan: you said the game plays 8 tracks right?
[2:03:45 AM] No-Bark Noonan: http://pastebin.com/Z9thaJaP
[2:03:51 AM] No-Bark Noonan: lines 28 and 30
[2:04:22 AM] No-Bark Noonan: they’re using 8 as some variable
maybe you could make it higher

does someone want to test this theory?
change the 8’s at $3FF6 and $3FFA to some higher number like 10 and see if it’ll actually play more tracks