[Patches] Change to reference-dump procedure at shutdown

[Mark Hammond]

> > If this patch is acceptable and it is felt this=20
> variable should be documented, let me know, and I will=20
> try and hunt down all the relevant places - but IMO,=20
> anyone who really needs these references dumped is likely=20
> to see this code :-)
>=20
> Mark, shouldn't this be enclosed in an #ifdef MS_WINDOWS bracket?

Quite possibly.  However, I was assuming that given there are over 2000 =
references outstanding when just starting and stopping the interpreter, =
the behaviour made sense for _all_ platforms, not just Windows.

Of course, just getting it for Windows still suits me fine...

Mark.