error in JudyHS man page

[Jeff Norden]

There is a minor, but very confusing error in the example code at the end of the JudyHS man page.
The line

               if (*PValue == 0) // check if duplicate

should be changed to

               if (*PValue != 0) // check if duplicate

This is because, as explained earlier in the man page, the value associated with a key is initialized to zero when the key is *not* already in the array. So *PValue==0 is true when the line is *not* a duplicate.

This was reported upstream a couple of years ago, but I doubt if it will be fixed there any time soon. See:
http://sourceforge.net/tracker/?func=detail&aid=2696938&group_id=55753&atid=478138

Maybe if ubuntu fixes this, the correction will be picked up by other distros, and nobody else will waste time puzzling over this as I did.

I'm attaching .c files with the orig and corrected code. If you compile them, you can verify that the corrected code works as expected, and the orig labels every line of the input file as a duplicate.

Thanks,
-Jeff