[Bug 5553] New: Gothic II crashes when loading a game (crash in IDirect3DVertexBufferImpl_Lock)

[Wine Bugs]

http://bugs.winehq.org/show_bug.cgi?id=5553

Summary: Gothic II crashes when loading a game (crash in
                    IDirect3DVertexBufferImpl_Lock)
           Product: Wine
           Version: CVS
          Platform: Other
        OS/Version: other
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: wine-directx-ddraw
        AssignedTo: [e-mail]
        ReportedBy: [e-mail]

Gothic II crashes after loading a saved game (right when it finished loading 
and tries to display something). Music has been disabled as well as the 
videos, otherwise it doesn't come even to the main menu.
The crash happens in IDirect3DVertexBufferImpl_Lock 
(dlls/ddraw/vertexbuffer.c:217). Perhaps it's a null pointer dereference.