libgdx/libgdx — pull request #1762 by manuel-freire (2014-04-25 12:54:18+00:00)
Title: Fix bug in polygon intersections

There was a bug in the latest fix for polygon intersections: advancing x3, y3 to x4, y4 should be done for *every*
polygon edge, even if that edge was parallel to the segment or line being tested (d == 0). My apologies for not testing the original fix better.