cms-sw/cmssw — pull request #3475 by mtosi (2014-04-24 11:00:57+00:00)
Title: From cmssw 7 1 0 pre6 p vat hlt

changes in PVClusterComparer make no difference in performance (default parameters are equivalent to old setting)
but they allow to define track selections (for defining the vertex ranking) via configuration

the change in the SeedGeneratorFromProtoTracksEDProducer
should prevent segmentation violation error when the vertex collection exists but it is empty ...