cms-sw/cmssw — pull request #2144 by fabiocos (2014-01-23 10:06:44+00:00)
Title: 53X back-port of Pdf Weight modifications

Back-port into 53X of the Pdf Weight code modifications introduced in order to allow to use one of the computed PDF sets as denominator for weight definition. Set also a protection to force PDF information to be written according to the LHAPDF parton code (i.e. gluon code must be 0 and not 21 as it is in sherpa).