Fixed weird struct problem from downs, see mini/compile_structs1.d Rewrote DtoIndexStruct/Class , the old implementation were way too complex for what we really need now - since the DotVar changes.

module enum1;

void main()
{
    enum {
        HELLO,
        WORLD
    }

    assert(HELLO == 0);
    assert(WORLD == 1);
}