rsaenh: fix bugs in RSAENH_CPAcquireContext and RSAENH_CPGetProvParam

[Mounir IDRASSI]

Thanks for your reply. I'm rewriting the patches and sending them back.

Mounir IDRASSI
IDRIX - Cryptography and IT Security Experts
http://www.idrix.fr

Detlef Riekenberg wrote:
> I have no Idea about the code, but the missing defines should
> be a seperate patch.
>
> Your idention looks broken.
> Wine is using 4 Space, when possible.
>