std.HashMap: fix getPtrAdapted. AstGen: fix fn param iteration

There was a bug in stage2 regarding iteration of function parameter AST.
This resulted in a false negative "unused parameter" compile error,
which, when fixed, revealed a bug in the std lib HashMap implementation.
47f2463b5cAndrew Kelley committed on 8/6/2021, 6:17:29 AMparentc03a04a
2 files changedLine totals unavailable