DataFormats/L1Trigger -- updated class version to l1extra::L1MuonParticleExtended::StationData

This should solve the error found here: 
https://cmssdt.cern.ch/SDT/cgi-bin/buildlogs/slc6_amd64_gcc472/CMSSW_6_2_X_SLHC_2014-10-26-1400/DataFormats/L1Trigger