shell32/tests: Clean make new folder test (Valgrind)

[Michael Mc Donnell]

Hi!

What is the reason this patch by Nikolay Sivov was not included in the
latest version of wine? It fixes a clean-up bug on some Windows XP
machines, and tidies up the code nicely.

Wine-patches archive link:
http://www.winehq.org/pipermail/wine-patches/2011-January/098342.html

Regards,
Michael Mc Donnell

P.S. Thanks Nikolay for fixing my first win32 test.