Merge branch 'rel-4.1' of https://github.com/GridSpace/grid-apps into drill-improvments

src/kiri-mode/cam/slice.js

@@ -504,6 +504,7 @@ CAM.holes = async function(settings, widget, individual, rec) {
                 continue;
             }
             for (let poly of inner) {
+                if ( poly.points.length < 7 ) continue;
                 let center = poly.calcCircleCenter();
                 center.area = poly.area();
                 center.overlapping = [center]