Add support for ADFs with less than 80 cylinders

[dirkwhoffmann]

          Hi @mras0 and @dirkwhoffmann 

I have found another ADF which fails to insert ...

https://www.pouet.net/prod.php?which=94129

it works in SAE but not in latest vAmiga Mac v2.4.b1 and also not in v2.3

is it maybe also because of the extended format?

Originally posted by @mithrendal in https://github.com/dirkwhoffmann/vAmiga/issues/788#issuecomment-1505803359

[dirkwhoffmann]

Part of v2.4