shell32/tests: Skip Listview interaction tests on Vista+, list doesn't contain any items for some reason.

[testbot at testbot.winehq.org]

Hi,

While running your changed tests on Windows, I think I found new failures.
Being a bot and all I'm not very good at pattern recognition, so I might be
wrong, but could you please double-check?
Full results can be found at
http://testbot.winehq.org/JobDetails.pl?Key=1735

Your paranoid android.


=== W98SE (32 bit shlview) ===
shlview.c:520: Test failed: expected not empty folder
Timeout

=== WNT4WSSP6 (32 bit shlview) ===
No test summary line found