Linker errors with Interfaces

[Adrian Matoga]

> I get these in both cases:
> 
> output\interface_test.obj(interface_test) 
>  Error 42: Symbol Undefined _D14interface_test14Transmogrifier12transmogrifyMFZv
> output\interface_test.obj(interface_test) 
>  Error 42: Symbol Undefined _D14interface_test14Transmogrifier14untransmogrifyMFZv

I reported this as a bug a few days ago:
http://d.puremagic.com/issues/show_bug.cgi?id=4542

I like the NVI idiom and hope this will finally work in future releases.

Adrian