Adapted to the new ClipperUtils.hpp interface by @alexrj

lib/Slic3r/Print/Object.pm

@@ -7,7 +7,7 @@ use List::Util qw(min max sum first);
 use Slic3r::Flow ':roles';
 use Slic3r::Geometry qw(X Y Z PI scale unscale chained_path epsilon);
 use Slic3r::Geometry::Clipper qw(diff diff_ex intersection intersection_ex union union_ex 
-    offset offset_ex offset2 offset2_ex intersection_ppl JT_MITER);
+    offset offset_ex offset2 offset2_ex JT_MITER);
 use Slic3r::Print::State ':steps';
 use Slic3r::Surface ':types';