oleaut32: variant - allow conversion of VT_DISPATCH into VT_BSTR in VarCat

[Dan Kegel]

Alex wrote:
> While reviewing a tax application, I found out that this app tries to
> VarCat(VT_BSTR, VT_DISPATCH) and viceversa. By allowing this conversion,
> the application proceeds normally until the next step.

Please include a change to the conformance test to test this case.

Also, if you have a minute, please file a bug report at http://bugs.winehq.org
so we know what tax application it is, etc.

Thanks!

- Dan
(the guy who asked Benjamin do all those VarCat fixes...)

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