[PATCH] xaudio2: Fix 32-bit build.

[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=52231

Your paranoid android.


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

Report errors:
The report seems to have been truncated

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

Report errors:
The report seems to have been truncated