Fix up bug in one of the internal consistency checks
Fix up bug in one of the internal consistency checks

Deg2 were being used where it should have been Cm2.  Probably that particular path
through the code was not extensively used, since this was just throwing an error because
the check failed.

DavidBrainard/AdaptiveOpticsSoftware,DavidBrainard/AdaptiveOpticsSoftware,DavidBrainard/AdaptiveOpticsSoftware,DavidBrainard/AdaptiveOpticsSoftware,DavidBrainard/AdaptiveOpticsAnalysis,DavidBrainard/AdaptiveOpticsSoftware,DavidBrainard/AdaptiveOpticsAnalysis,DavidBrainard/AdaptiveOpticsSoftware