[Bug 43358] xaudio crashes in EVE Online during launch

[wine-bugs at winehq.org]

https://bugs.winehq.org/show_bug.cgi?id=43358

--- Comment #1 from Sebastian Lackner <sebastian at fds-team.de> ---
Created attachment 58719
  --> https://bugs.winehq.org/attachment.cgi?id=58719
Use assembly wrapper to call OnVoiceProcessingPassStart callback.

My current theory (based on the backtrace and the generated assembly code) is
that the OnVoiceProcessingPassStart callback (which is implemented by the
application) corrupts the %esi register.

The attached patch should fix this issue (this is a slightly improved version
compared to what I shared on IRC), but the question is if it is the correct
approach. It is necessary to look at the assembly code of EVE Online to
determine if they really use a broken OnVoiceProcessingPassStart function, or
if recent versions of GCC just generates incorrect code somewhere else.

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