Segfault when footprintinit with Phobos DSK

[scsides]

ISIS version(s) affected: 7.0

Description

Many Mex HRSC SRC images segfault in footprintinit when using the Phobos DSK.
Segfault looks like it is in: NaifDskShape::setLocalNormalFromIntercept()

Image: HC545_0031_SR2.lev0.cub
spiceinit from=HC545_0031_SR2.lev0.cub tspk='(base/kernels/spk/de405.bsp, tspk/MAR097.bsp)' IK=MEX_HRSC_V09.ti extra=spk/MEX_STRUCT_V01.bsp shape=user model=dsk/PHOBOS_K137_DLR_V01.bds iak=iak/hrscsrcAddendum002.ti

This example uses some kernels from the mission team, and the modified camera model from PR #4910. All are documented as better than the defaults stored in ISISDATA

How to reproduce

footprintinit from=HC545_0031_SR2.lev0.cub

Possible Solution

Additional context

The camera model has been checked to see if the changes caused this issue. The model appears to be working correctly.
The pointing for all of the images of Phobos is a little off, but that's nothing out of the ordinary.
footprintinit also fails if Bullet is used as the ray trace engine, but in a different way

[scsides]

@lwellerastro, FYI this is the new issue for Mex HRSC SRC