shdocvw: change return value for PersistMemory_Load

[Jacek Caban]

Louis. Lenders wrote:
> Hi, i send this to wine-patches for review (by Jacek i guess). A user
> submitted garbage test results for Segamic:
> http://prdownloads.sourceforge.net/semagic/Semagic1709for2k.exe?download
>
> It's the second time i see an app failing on PersistMemory_Load
> returning E_NOTIMPL.
> Attached patch makes the app start fine. I know faking success return
> value can have  unwanted side effects, but for this one it seems to be
> quite harmless. Also helps a bit for
> http://bugs.winehq.org/show_bug.cgi?id=10588
>
> Jacek, if you think it could cause trouble could you give a response?

I think this patch is fine and it may go to Git.

Thanks,
    Jacek