[krbdev.mit.edu #8661] ksu segfaults when argc == 0

[Greg Hudson via RT]

I think just about all of the programs in the krb5 source tree will seg 
fault when argc is 0, and I'm generally not concerned about that.  It 
might make sense for ksu to be careful because it's setuid, although I 
don't think getting a setuid program to perform a null dereference 
constitutes a vulnerability (I don't think operating systems allow 
setuid programs to dump core, for instance).