cad/openscad: unbreak with boost 1.69

src/CSGTermEvaluator.cc:112:9: error: no viable conversion from 'boost::tribool' to 'bool'
                        bool convex = ps->convexValue();
                             ^        ~~~~~~~~~~~~~~~~~

PR:		232525

1 files changed, 13 insertions, 0 deletions

diff --git a/cad/openscad/files/patch-boost-1.69 b/cad/openscad/files/patch-boost-1.69
new file mode 100644
index 000000000000..6bee3b37fbae
--- /dev/null
+++ b/cad/openscad/files/patch-boost-1.69
@@ -0,0 +1,13 @@
+https://github.com/openscad/openscad/commit/ce5646179848
+
+--- src/CSGTermEvaluator.cc.orig	2015-03-09 05:03:30 UTC
++++ src/CSGTermEvaluator.cc
+@@ -109,7 +109,7 @@ static shared_ptr<CSGTerm> evaluate_csg_term_from_geom
+ 			shared_ptr<const PolySet> ps = dynamic_pointer_cast<const PolySet>(geom);
+ 			// Since is_convex() doesn't handle non-planar faces, we need to tessellate
+ 			// also in the indeterminate state so we cannot just use a boolean comparison. See #1061
+-			bool convex = ps->convexValue();
++			bool convex(ps->convexValue());
+ 			if (ps && !convex) {
+ 				assert(ps->getDimension() == 3);
+ 				PolySet *ps_tri = new PolySet(3, ps->convexValue());