[PATCH] shell32: Remove redundant not-NULL check (coccinellery)

[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=49024

Your paranoid android.


=== debian9 (32 bit report) ===

shell32:
progman_dde.c:249: Test failed: expected DMLERR_NO_ERROR, got 16393
progman_dde.c:250: Test failed: directory should not exist