fix ssp extraction

[rwhitcroft]

Fixes extraction of SSP creds:

kali@kali:~/pypykatz$ pypykatz lsa minidump /tmp/out.dmp -p ssp
INFO:pypykatz:Parsing file /tmp/out.dmp
FILE: ======== /tmp/out.dmp =======
== Orphaned credentials ==
        == SSP [2f41d]==
                username rdpuser
                domainname 
                password Password1
                password (hex)500061007300730077006f007200640031000000

[rwhitcroft]

Closing, author of pypykatz is not interested in this fix.

[skelsec]

heyoo! Your code looks okay, but please understand I don't always have time to check all outstanding PRs, as I'm doing a thousand other things next to maintaining free open source repos.
If you reopen I can take a look at it, better would be if you could attach a dump file that I can add to the test suite.