Another tweak to the solver to make it handle blank tiles correctly.
authorsimon <simon@cda61777-01e9-0310-a592-d414129be87e>
Sun, 22 May 2005 12:14:39 +0000 (12:14 +0000)
committersimon <simon@cda61777-01e9-0310-a592-d414129be87e>
Sun, 22 May 2005 12:14:39 +0000 (12:14 +0000)
The previous checkin stopped it choking on them, but it didn't
actually manage to _deduce_ that all the edges bordering them had to
be closed. Now it does better.

git-svn-id: svn://svn.tartarus.org/sgt/puzzles@5829 cda61777-01e9-0310-a592-d414129be87e


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