sk89q/worldedit — pull request #149 by GuntherDW (2011-11-09 19:09:58+00:00)
Title: Fixing issue when an external plugin wants to set the Polygonal2DSelection

The issue with Polygonal2DSelection is that it "recalculates" after both setMinimalY and setMaximalY.
But because those both init with 0, your selection will always be 0 -> maxY.

This pullreq fixes that issue by using expandY()