[foreign-memaccess] RFR 8234644: Misc cleanup of the memory access API implementation

[Paul Sandoz]

> On Nov 22, 2019, at 10:50 AM, Maurizio Cimadamore <maurizio.cimadamore at oracle.com> wrote:
> 
> I'll fix these and push directly, if that's ok
> 

Thanks, push away!

Paul.