[PATCH v2] kernel32/lzexpand: Fix uninitialized read in read_header

[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=63872

Your paranoid android.


=== debian10 (32 bit WoW report) ===

kernel32:
debugger: Timeout