ref: bce3f1bd2680b0f6bd6f6781b551c7c6b1e51f65
parent: 76824e16925df7d4aceae5f382bf53ddc55b94a0
author: Simon Tatham <anakin@pobox.com>
date: Mon Apr 1 05:38:04 EDT 2013
Greg Hewgill points out a code path on which the angle parameter to the Penrose grid generation function can fail to be initialised. [originally from svn r9798]