Barend Gehrels a46e2603d8 [buffer][fix] In rare cases an extra ring was traversed and created. Fixed, that ring is
discarded now. This fixes behaviour of assign_parents with positive-rings in positive-rings (when
check_for_orientation is true; normally (for overlay) it is false)

It also reverses a negative-only ring so fixes a linestring_buffer testcase.

For multi-polygon it fixes new testcase rt_u2 found by recursive-polygon-buffer test
2014-08-09 23:51:42 +02:00
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