Barend Gehrels 3628e85a25 [buffer] fix non-intersecting sides around concave points
there was no segment in between generated, therefore if the side-segments
did not intersect (e.g. donut_diamond in polygon_buffer.cpp unit test),
there was no intersection at all. Now a helper piece is generated and it
will intersect.
2014-06-22 15:12:40 +02:00
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