Bug 99342

The following special case shapes will be considered "empty" in the sense that ExclusionShape::getIncludedIntervals() and ExclusionShape::getExcludedIntervals() will always return empty lists of intervals: rectangles of zero width or height, circles with 0 radius, ellipses with 0 radiusX or radiusY, polygons with less than 3 vertices. Note that this isn't an exhaustive list of special cases. Still remaining: polygons with less than three vertices that are not coincident or colinear, rectangles whose corner radiusX is greater than the rectangle's width/2, rectangles whose corner radiusY is greater than the rectangle's height/2, scenarios where shape-padding and shape-padding exceeds the shape's interior space.