In the case where two were direct vertical neighbors in the grid
but not in the underlying cartesian grid (e.g. because of MINPV or
pinch outs), we treated them as NNCs and wrote the transmissibilty
to TRANNC.
With this patch we detect this situation (two neighbor cells with identical
i and i and no active cells between them) and do not create an NNC
in the eclipse output files but write the transmissibility to TRANZ.