(issue1782) Select index based on km for step generation If we calculate from a larger KM to a smaller KM the larger index refers to the smaller KM so to correctly draw the steps with the assumption that the previous q is drawn together with the current q we have to select the next / prev index accordingly.

select.abflusstafel = \
    SELECT ABFLUSSTAFEL_NR, \
           ABFLUSSTAFEL_BEZ, \
           GUELTIG_VON, \
           GUELTIG_BIS, \
           PEGELNULLPUNKT, \
           AT.BFG_ID \
    FROM ABFLUSSTAFEL AT \
    WHERE MESSSTELLE_NR LIKE :number