This has been discussed here before, but no, in common English usage, a point is not a zero length line. Maybe in mathematics, but not in everyday English as the judge was using the terms.
Don't take my word for it, draw a dot on a piece of paper and ask ten non-geeky people, "Is this a line?" :-)
Actually, it's not true in mathematics either. A line is something which has one and only one dimension, and a point is something which has no dimension. A zero length line would not be a line, as it would have fewer than one dimension. So, there is no such thing as a zero length line.
Don't take my word for it, draw a dot on a piece of paper and ask ten non-geeky people, "Is this a line?" :-)