[Bug 17518] New: winmm/mci tests fail with +heap enabled

http://bugs.winehq.org/show_bug.cgi?id=17518

Summary: winmm/mci tests fail with +heap enabled
           Product: Wine
           Version: 1.1.15
          Platform: PC
               URL: http://test.winehq.org/data/86f79e3a558ca1fb5d596e9f6240
                    3ca89178d3cf/wine_xp_ae-ub-904-heap/winmm:mci.html
        OS/Version: Linux
            Status: NEW
          Keywords: download, source, testcase
          Severity: enhancement
          Priority: P2
         Component: -unknown
        AssignedTo: [e-mail]
        ReportedBy: [e-mail]

Unhandled exception: page fault on read access to 0x00140000 in 32-bit code
(0x7ee4a0e3).

Backtrace:
=>0 0x7ee4a0e3 WideCharToMultiByte+0x203(page=0, flags=0, src=0x140000,
srclen=1, dst="", dstlen=1024, defchar=0x0, used=(nil))
[/home/austin/wine-git/dlls/kernel32/../../include/wine/unicode.h:216] in
kernel32 (0x0061f8a8)
1 0x7e9d46d8 mciSendStringA+0x138(lpstrCommand="close all notify", lpstrRet="",
uRetLen=1024, hwndCallback=0x1ad005c)
[/home/austin/wine-git/dlls/winmm/mci.c:1510] in winmm (0x0061f8e8)
2 0x00403a4a in winmm_test (+0x3a4a) (0x0061fde8)
3 0x0040f31d in winmm_test (+0xf31d) (0x0061fe08)
4 0x0040f507 in winmm_test (+0xf507) (0x0061feb8)
5 0x004011d9 in winmm_test (+0x11d9) (0x0061fee8)
6 0x00401223 in winmm_test (+0x1223) (0x0061ff08)
7 0x7ee614e8 start_process+0x98(arg=(nil))
[/home/austin/wine-git/dlls/kernel32/process.c:907] in kernel32 (0x0061ffe8)
0x7ee4a0e3 WideCharToMultiByte+0x203
[/home/austin/wine-git/dlls/kernel32/../../include/wine/unicode.h:216] in
kernel32: cmpw $0,0x0(%eax)
216 while (*s) s++;