Fix sf.net bugs 1762981 and 1762977 and commit the patch from a comment in one of them.
Fix sf.net bugs 1762981 and 1762977 and commit the patch from a comment in one
of them.

Now partyline doesn't segfault anymore if you remove a user which isn't there.

I think NULL pointers don't like me :/.


git-svn-id: 3ad904ec35b89a071badd9cb0113dfe58093e920@818 726aef4b-f618-498e-8847-2d620e286838

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