New issue 365 by ddfalck2...@yahoo.com: extrusion taper dose not work with
circle
http://code.google.com/p/heekscad/issues/detail?id=365
Trying to create a draft angle to an extruded circle gives an error:
"Error making extruded solid: TopoDS::Wire"
Sketches made up of arcs and lines seem to work fine. A workaround is to
somehow create two arcs out of the circle and make a sketch of them.