Freeze issue when demo is over

[gameblabla]

Oi,
thanks for porting Cannonball to C !
I did notice an issue with it though. When you start the game and let the demo play for a while, it should normally display the highscore leaderboards. Instead, it freezes.
What happens is that it becomes stuck in a loop.
https://github.com/lantus/Cannonball-C/blob/master/src/main/engine/audio/osound.c#L473

The problem is that chan_ram is 0x800 in size and uint8_t is not big enough for the for loop to clear its memory so it promptly becomes stuck. Original source code was using uint16_t here, not sure why you decided to use an uint8_t here.
Switch it to uint16_t and the leaderboard appears like normal.
Not sure if this happens on a real Amiga but it definitely happens on a PC.