kernel32: catch invalid memory accesses in resource enumerationhandlers

[Dmitry Timoshkov]

"Andrey Turkin" <andrey.turkin at gmail.com> wrote:

> This is what Windows do as described by AF in bug 10525 (I tested it and
> all 3 enumeration functions indeed do catch page faults and fail
> gracefully). Should fix bugs 10525 and 16320.

It would be better to use SEH only around the real callback call,
and not around the whole API body. Adding 2 wrappers for calling
the callbacks would simplify the code. And the tests wouldn't hurt.

-- 
Dmitry.