Use const CPoint() accessor in shape line chain

Non-const version was removed in nightlies

Author: qu1ck

InteractiveHtmlBom/ecad/kicad.py

@@ -115,7 +115,7 @@ def parse_poly_set(self, polygon_set):
                 return result
             parsed_outline = []
             for point_index in range(outline.PointCount()):
-                point = outline.Point(point_index)
+                point = outline.CPoint(point_index)
                 parsed_outline.append(self.normalize([point.x, point.y]))
             result.append(parsed_outline)