Correction of a problem on block construction
Correction of a problem on block construction

If some block points in a previsou section, block boundaries have to be
recomputed in order to stay safe trhough scheduling. The new version
handle it
srokicki/HybridDBT,srokicki/HybridDBT,srokicki/HybridDBT,srokicki/HybridDBT,srokicki/HybridDBT