Add error for bad cast from `*T` to `*[n]T`

Casting `*T` to `*[1]T` should still work, but every other length
will now be a compiler error instead of a potential OOB access.
9964f1c160InKryption committed on 3/16/2023, 11:00:36 AM· committed by Veikka Tuominenparente1e414e
2 files changedLine totals unavailable