Update to latest code from PS

src/libslic3r/Arachne/WallToolPaths.cpp

@@ -361,7 +361,7 @@ void removeSmallAreas(Polygons &thiss, const double min_area_size, const bool re
         }
     } else {
         // For each polygon, computes the signed area, move small outlines at the end of the vector and keep pointer on small holes
-        std::vector<Polygon> small_holes;
+        Polygons small_holes;
         for (auto it = thiss.begin(); it < new_end;) {
             if (double area = ClipperLib::Area(to_path(*it)); fabs(area) < min_area_size) {
                 if (area >= 0) {