Mael Rouxel-Labbé 5dfd491622 Added a precondition ... An empty range will mean a segfault when calling weights.back(), with the precondition, it will be more obvious.		2018-02-16 16:41:04 +01:00
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CGAL	Added a precondition	2018-02-16 16:41:04 +01:00