MAINT: avoid out of bounds errors in interpolation
MAINT: avoid out of bounds errors in interpolation

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