[Bug 50162] New: msvcrt-Math_Precision patchset breaks audio in Diablo III

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=50162

Bug ID: 50162
           Summary: msvcrt-Math_Precision patchset breaks audio in Diablo
                    III
           Product: Wine-staging
           Version: 5.22
          Hardware: x86-64
               URL: https://www.blizzard.com/download/confirmation?platfor
                    m=windows&product=d3
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: -unknown
          Assignee: [e-mail]
          Reporter: [e-mail]
                CC: [e-mail], [e-mail]
   Regression SHA1: 7734f7a8087291ec15c4d1adfe1a6db055972266
      Distribution: ArchLinux

Created attachment 68678
  --> https://bugs.winehq.org/attachment.cgi?id=68678
Use precise_cosh in unix_cosh instead of unix_cos

Steps to reproduce:
1. Lower your audio volume to not break ears;
2. Launch Diablo III ("wine Diablo\ III64.exe -launch").

Expected result:
Menu music starts playing, UI sounds work.

Actual result:
There is about 2 seconds of loud, garbled audio, then silence.

I've bisected this to msvcrt-Math_Precision patchset and its latest rebase.
Wine 2fb08bed46f + Staging 0192a7b3 don't have the issue.
Wine c72e1b096d1 + Staging 7734f7a8 is where the problem is introduced.
Building Staging 5.22 with "-W msvcrt-Math_Precision" also produces a working
version.

Looking at the patchset's rebase (7734f7a8), we see that precise_cosh was used
in unix_cos instead of unix_cosh. Reverting unix_cos to use cos, and using
precise_cosh instead in unix_cosh, solves the issue for me. I've attached a
patch with these changes.