[nem-en] fix to MSBuildTask.n

[NoiseEHC]

> Hm, but we received your very first mail. I already applied your
> changes, is there something more? (and it would be must better to send
> a patch in such a situation)
>
>   

They are the same. I just sent it first then did not get it via the 
mailing list. Then sent it again to no effect.
So I sent it a third time. Finally I could download from the mailing 
list. Later the other two arrived.

Probably my SMTP server sucks since my later emails appeared in this 
list before...
Can you look at the mail server's log to tell me when that server 
received my email please?
My theory is that bigger messages take much more time with my ISP...

BTW I have answered to the license question too but cannot see it yet.