Update lagrange dualspace regression tests for fixed 1-form pullbacks

The changes are only numerical, so DIFF_NUMBERS=1 must be used to catch the difference

Fix pullback matrix indexing in dspacelagrange.c

Thanks to: Yang Zongze

I think the incorrect indexing wasn't causing problems before because it doesn't matter if pNk == 1.
That's the case when the

Fix pullback matrix indexing in dspacelagrange.c

Thanks to: Yang Zongze

I think the incorrect indexing wasn't causing problems before because it doesn't matter if pNk == 1.
That's the case when the form degree we are pulling back is 0 or the boundary points' dimension. So
If we're only testing d <= 3, this should only have cause problems pulling a 1-form back onto a 2D face.
I will have to check to see if we have a regression test for this case.

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Plex+FE: Now we can turn on second derivatives in an FEM calculation - Now FE interpolation and PetscFEEvaluateFieldJets_Internal() can also do Hessians - Add jet degree to DS - Add PTAP operations f

Plex+FE: Now we can turn on second derivatives in an FEM calculation - Now FE interpolation and PetscFEEvaluateFieldJets_Internal() can also do Hessians - Add jet degree to DS - Add PTAP operations for small matrices

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Fix several typos in error strings

DM: Replace 0 -> NULL for pointers