[Bug 5658] New: Crash with VariantChangeType()

[Wine Bugs]

http://bugs.winehq.org/show_bug.cgi?id=5658

Summary: Crash with VariantChangeType()
           Product: Wine
           Version: unspecified
          Platform: PC-x86-64
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: wine-ole
        AssignedTo: [e-mail]
        ReportedBy: [e-mail]

VariantChangeType is observed crashing if it gets the same type.
It takes three parameters, input, expected type id, and output variant.
If you try to convert a VT_BOOL to a VT_BOOL it crashes.

Example program, not minimal:

This program crashes a bug in VariantChangeType()

Download: 
http://www.batman.no/buzzwine/

Reference Screenshot:
http://www.batman.no/buzzclone/pre-v0.3-1.gif

Steps to reproduce: 
Download entire folder. Unpack Gear.tar.gz into Gear. Start "wine buzz.exe".
Press "OK". Click treeview, "Generators". DnD FSM Infector next to "Master".
Doubleclick "Infector". Notice how sliders are drawn wrong, and does not work
correctly and eventually crashes the program.

Untested example code:
VARIANT v; 
VariantInit(&v); 
v.vt=VT_BOOL; 
v.boolValue=FALSE; VARIANT v2; 
VariantInit(&v2); 
VariantChangeType(&v, VT_BOOL, &v2);