D1 & D2 alpha's for Win64

[Sönke Ludwig]

Am 10/14/2012 9:54 PM, schrieb Walter Bright:
> http://ftp.digitalmars.com/dmd1beta.zip
> http://ftp.digitalmars.com/dmd2beta.zip
> 
> Be the first kid on your block to build a dmd Win64 app!

I get a problem, that is not really 64-bit related, but currently keeps
me from trying anything more serious:

const(T[U]) instantiates an AssociativeArray!(U, const(T)) internally
and complains about some failing assignment to a const(T) (without line
number).

I think it should rather create a const(AssociativeArray!(U, T)), which
would probably avoid that error.