Hi all,

Thank you guys for insightful help.  I just read the code and now I understand
what you guys are saying.  Yeah, I can say the fix is "spot on".

But, to be honest, it's hard to see why you need "if (p)" at  the first glance.
So, how about this fix, instead?

I also found a bug in show_list().  I'm attaching a patch as well.
-- 
           yashi