ref: bbf800e49ee5965c21eb4a89116e7529d0d4954f
parent: 6567260eb0af75a3c82f4a8a8292c6446d94fd98
author: Simon Tatham <anakin@pobox.com>
date: Sun Jul 29 17:29:26 EDT 2012
Don't fail an assertion when setting up the provided clues at the start of the solver, if they contradict each other. (Could trigger on user-provided grids.) [originally from svn r9594]