NickQiZhu/dc.js — pull request #83 by seanbell (2012-11-15 17:37:49+00:00)
Title: [#77] Extended brushing logic to check for empty extent

I looked at the behavior of #77 in the debugger; it seems that the brush extent is set to a range where the start and end are equal, e.g. [0.2, 0.2]. I believe this commit fixes the issue.