[Bug 52072] winmm:mci fails in wow64 Wine

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=52072

--- Comment #2 from François Gouget  ---
These days I do a make clean between each bisection step because without it
builds tend to fail with all the churn that's going on. Then I check again that
I can reproduce the issue with the bisected commit, and that it does not happen
with the previous commit.

But just to be sure I double-checked with two builds from scratch and the
result holds: I can reproduce the issue with 7c5761ed40f0 but not with
6ebcc54a5c2c.

That said maybe it's some uninitialized data that's now getting a bad value
because the memory layout changed.