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Fixed an issue with the VCA device interface, the fields used to calculate the CRC check digit were too small.
When blocking a lens off-center (for example a decentered progressive blocked on OC), if the calculated CRIB is larger than the blanksize, this is valid, but some generators will reject the job. Previously, we would adjust the crib down to the blanksize, but this is NOT valid when the lens is blocked off-center. Changed the VCA interface to suppress cribbing when the CRIB > BLANKSIZE (ie send CRIB=0) instead.
Digital Surface Types
Under certain circumstances, after editing a digital surface entry, the user could no longer edit other entries without first having return to the main menu. This has been corrected.
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