[Bug 56744] Serial number in smbios system table is not filled on Linux in practice

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=56744

--- Comment #3 from Nikolay Sivov  ---
Yes, there is one that I can't share. The problem there is that string is
accessed without checking of offset is zero. It obviously is not going to work
anywhere if this field is missing.

But that's not the point, I reported this because we have this code that looks
like it should be working, but sysfs configuration prevents it. It behaves the
same on Fedora and Debian kernels, so we might as well simply set it to 0, or
to something static.