[Bug 26969] New: acmStreamConvert fails struct size check on win64 while winecfg audio test

http://bugs.winehq.org/show_bug.cgi?id=26969

Summary: acmStreamConvert fails struct size check on win64
                    while winecfg audio test
           Product: Wine
           Version: 1.3.18
          Platform: x86-64
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: msacm32
        AssignedTo: [e-mail]
        ReportedBy: [e-mail]

Created an attachment (id=34396)
 --> (http://bugs.winehq.org/attachment.cgi?id=34396)
+wave,+alsa,+oss,+winmm,+wavemap,+msacm win64 failture log

WINEDEBUG=+wave,+alsa,+oss,+winmm,+wavemap,+msacm log attached.

Following the log, this part of check at dlls/msacm32/stream.c:93 failed on
64bit:
pash->cbStruct < sizeof(ACMSTREAMHEADER)
Still, I haven't found why it fails.

I'll attach same log from win32-only wineprefix which plays sound just ok.
Selected driver: ALSA. Same on OSS or both.