This patch (committed) adds a new custom number formatter contributed by
2007-06-14 David Gilbert <david.gilbert@...>
(draw): Don't draw if area doesn't have positive dimensions,
* source/org/jfree/chart/util/HexNumberFormat.java: New class.
P.S. A little bug fix for LineBorder sneaked in on this patch too. I
was too lazy to separate it out.