them on the primary text; account for some fiddliness with right aligned
text and less than a single pixel of extra space. Rendering text at x +
0.3, say, would some times shift it over an entire pixel to x + 1. Whee!
git-svn-id: https://samskivert.googlecode.com/svn/trunk@965 6335cc39-0255-0410-8fd6-9bcaacd3b74c