Comment 15 for bug 1753224

This issue also exists in SHAPE_ARC::ConvertToPolyline( double aAccuracy )

I also tested in DRAWSEGMENT::TransformShapeWithClearanceToPolygon a slightly different formula to calculate segments counts using an absolute error.

Using 0.05 mm for absolute max errors gives good results, without changing the file format.

I can commit this minor change.