mapi32: initialize session pointer to zero in MAPILogonEx (3nd resend (added extra spaces))

[James Hawkins]

2008/10/6 Louis. Lenders <xerox_xerox2000 at yahoo.co.uk>:
> fixes a crash reported on userlist:
> http://forum.winehq.org/viewtopic.php?t=2447
>
> As the function is a complete stub, it's probably a good ides to initialize
> it to zero anyway.
>

You haven't addressed the concerns pointed out by Juan.

-- 
James Hawkins