st_dwithin(geog, geog, 0) doesn't work?

[pramsey]

Just tried to do a zero-radius query using st_dwithin, a polygon and a point, and got no results! Works with any non-zero radius!

[pramsey]

-- true
select st_dwithin('POLYGON((-10 -10, -10 10, 10 10, 10 -10, -10 -10))'::geography, 'POINT(0 0)'::geography, 0.1);
-- false !??
select st_dwithin('POLYGON((-10 -10, -10 10, 10 10, 10 -10, -10 -10))'::geography, 'POINT(0 0)'::geography, 0);

[pramsey]

This also applies to 2.0

[pramsey]

Fixed in trunk at r9669, in 1.5 at r r9668, r9667