[Bug 47399] New: Mozart 13 crashes on startup

https://bugs.winehq.org/show_bug.cgi?id=47399

Bug ID: 47399
           Summary: Mozart 13 crashes on startup
           Product: Wine
           Version: 4.10
          Hardware: x86
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P2
         Component: -unknown
          Assignee: [e-mail]
          Reporter: [e-mail]
      Distribution: ---

Mozart 13 can be downloaded from: http://www.mozart.co.uk/programs/mzsetup.exe

It crashes while starting up. This line from the relay trace looks relevant:

0009:Call user32.CreateWindowExW(00000000,0120bb60 L"",01ac3e00
L"Mozart",00cf8000,80000000,80000000,80000000,80000000,00000000,00010066,00400000,00000000)
ret=00c6eb88

It's trying to create a window with an empty string for a class name, and that
fails.