shell32: Handle TRASH_EnumItems failures correctly

[Marvin]

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
https://testbot.winehq.org/JobDetails.pl?Key=11318

Your paranoid android.


=== wvistau64 (32 bit recyclebin) ===
recyclebin.c:98: Test failed: Expected recycle bin to have 0x8 bytes

=== wvistau64 (64 bit recyclebin) ===
recyclebin.c:98: Test failed: Expected recycle bin to have 0x8 bytes