dmd 1.053 and 2.037 release

[Extrawurst]

Walter Bright wrote:
> Probably the biggest thing is opDispatch!
> 
> http://www.digitalmars.com/d/1.0/changelog.html
> http://ftp.digitalmars.com/dmd.1.053.zip
> 
> 
> http://www.digitalmars.com/d/2.0/changelog.html
> http://ftp.digitalmars.com/dmd.2.037.zip
> 
> Many thanks to the numerous people who contributed to this update.

Why is opPow just override-able in classes and not in structs ? Is that 
intended behaviour ?