[Bug 30718] xna40 installation fails, needs sfc.LoadSfcDLL

https://bugs.winehq.org/show_bug.cgi?id=30718

--- Comment #10 from Austin English  ---
(In reply to Louis Lenders from comment #8)
> If I do:
>
> export COMPlus_OnlyUseLatestCLR=1
>
> and then run the messagbox is gone. Adding the registrykey
> ``OnlyUseLatestCLR`` most likely will also do the trick. I`m not sure though
> if this registrykey should be added by default in wine

This, combined with using dotnet40 again, makes the message box go away as well
as the issues in the logs. The stub for SRSetRestorePoint also helped, of
course.

Winetricks is now happy, I'm not sure if something needs to be done for 
COMPlus_OnlyUseLatestCLR in Wine or not, however.