Pie menus with more than 8 items: get rid of warning

It would be good to have the possibility to design custom pie menus with more than 8 items. Right now, the solution is a bit hacky: blender.stackexchange.com/questions/120237/how-would-one-code-a-pie-menu-with-an-additional-traditional-menu-beneath-it

If not possible, it would be great to at least get rid of the warning message in the System console.