[PATCH] shell32/tests: Use the global memory allocation helpers

[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=36083

Your paranoid android.


=== w864 (32 bit progman_dde) ===
progman_dde.c:330: Test failed: window not created