ws2_32: Fix parameter validation order in getpeername.

[Alexandre Julliard]

Andrew Nguyen <arethusa26 at gmail.com> writes:

> Invalid pointers appear to be handled by getpeername in all versions
> of Windows, so adding an exception handler seems to be justified.

It's only justified if there is a real app that passes a bad pointer
that is not the result of some other Wine bug. Please provide more
details.

-- 
Alexandre Julliard
julliard at winehq.org