[TD]add ability to filter obvious geometry errors

- also add checks for geometry errors

src/Mod/TechDraw/App/Geometry.h

@@ -106,6 +106,7 @@ class TechDrawExport BaseGeom
         Base::Vector3d nearPoint(Base::Vector3d p);
         Base::Vector3d nearPoint(const BaseGeom* p);
         static BaseGeom* baseFactory(TopoDS_Edge edge);
+        static bool validateEdge(TopoDS_Edge edge);
         bool closed(void);
         BaseGeom* copy();
         std::string dump();