BUG: had forgotten to pass test flag to `draw_walker`
BUG: had forgotten to pass test flag to `draw_walker`

bmockler/MOSFiT,mnicholl/MOSFiT,bmockler/MOSFiT,guillochon/MOSFiT,guillochon/FriendlyFit,guillochon/MOSFiT,guillochon/MOSFiT,mnicholl/MOSFiT,villrv/MOSFiT,mnicholl/MOSFiT,villrv/MOSFiT