[Bug 31507] New: midiInOpen x64 crash due to callback address 32-bit truncation

http://bugs.winehq.org/show_bug.cgi?id=31507

Bug #: 31507
           Summary: midiInOpen x64 crash due to callback address 32-bit
                    truncation
           Product: Wine
           Version: unspecified
          Platform: x86-64
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: winmm&mci
        AssignedTo: [e-mail]
        ReportedBy: [e-mail]
    Classification: Unclassified

midiInOpen seems to crash at calling the address, which looks like the lower
32-bit of the callback function address passed to it as a parameter.

I believe, the callback address is somewhere truncated from 64-bit to 32-bit in
the internal logic.

The affected software is this (64-bit standalone executable):
http://www.truepianos.com/downloads.php

I couldn't find the exact reason for this problem within wine sources.