[PATCH resend] shell32: Sanitize Program Manager icon and group names

[Marvin]

Hi,

While running your changed tests, 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=110312

Your paranoid android.


=== debian11 (32 bit Chinese:China report) ===

shell32:
shelllink.c:772: Test failed: dirty (0x00000000)
shelllink.c:772: Test failed: got 0x00000001
shelllink.c:772: Test failed: Didn't expect NULL
Unhandled exception: page fault on read access to 0x00000000 in 32-bit code (0x6a2e8ebd).