fix which corrects a problem when using Pythia8 as a decayer.
fix which corrects a problem when using Pythia8 as a decayer.

Patch by Andreas Morsch.

davidlt/root,gganis/root,esakellari/root,dfunke/root,mkret2/root,omazapa/root,bbockelm/root,cxx-hep/root-cern,omazapa/root-old,esakellari/my_root_for_test,lgiommi/root,0x0all/ROOT,0x0all/ROOT,nilqed/root,mattkretz/root,veprbl/root,veprbl/root,cxx-hep/root-cern,Y--/root,mattkretz/root,lgiommi/root,zzxuanyuan/root,perovic/root,Y--/root,alexschlueter/cern-root,omazapa/root,karies/root,simonpf/root,gbitzes/root,abhinavmoudgil95/root,gbitzes/root,esakellari/root,perovic/root,smarinac/root,simonpf/root,gganis/root,CristinaCristescu/root,root-mirror/root,zzxuanyuan/root,gbitzes/root,pspe/root,esakellari/my_root_for_test,vukasinmilosevic/root,sirinath/root,nilqed/root,sirinath/root,buuck/root,olifre/root,veprbl/root,sawenzel/root,karies/root,sbinet/cxx-root,mattkretz/root,sbinet/cxx-root,perovic/root,omazapa/root-old,cxx-hep/root-cern,satyarth934/root,buuck/root,karies/root,omazapa/root,davidlt/root,zzxuanyuan/root-compressor-dummy,omazapa/root-old,beniz/root,davidlt/root,mhuwiler/rootauto,simonpf/root,mkret2/root,omazapa/root,omazapa/root-old,bbockelm/root,buuck/root,zzxuanyuan/root-compressor-dummy,karies/root,gbitzes/root,agarciamontoro/root,pspe/root,Y--/root,omazapa/root,mattkretz/root,thomaskeck/root,jrtomps/root,mattkretz/root,mhuwiler/rootauto,lgiommi/root,agarciamontoro/root,smarinac/root,nilqed/root,BerserkerTroll/root,sirinath/root,georgtroska/root,gganis/root,BerserkerTroll/root,thomaskeck/root,dfunke/root,buuck/root,sawenzel/root,krafczyk/root,olifre/root,zzxuanyuan/root-compressor-dummy,davidlt/root,CristinaCristescu/root,beniz/root,omazapa/root,veprbl/root,veprbl/root,esakellari/root,veprbl/root,omazapa/root-old,Duraznos/root,omazapa/root-old,Duraznos/root,perovic/root,karies/root,root-mirror/root,bbockelm/root,mhuwiler/rootauto,buuck/root,sawenzel/root,dfunke/root,agarciamontoro/root,satyarth934/root,abhinavmoudgil95/root,alexschlueter/cern-root,sbinet/cxx-root,vukasinmilosevic/root,bbockelm/root,nilqed/root,bbockelm/root,esakellari/root,sawenzel/root,georgtroska/root,beniz/root,CristinaCristescu/root,olifre/root,jrtomps/root,beniz/root,esakellari/root,gganis/root,CristinaCristescu/root,satyarth934/root,zzxuanyuan/root,alexschlueter/cern-root,pspe/root,davidlt/root,veprbl/root,thomaskeck/root,satyarth934/root,sawenzel/root,karies/root,esakellari/root,mhuwiler/rootauto,olifre/root,sirinath/root,olifre/root,simonpf/root,buuck/root,krafczyk/root,agarciamontoro/root,evgeny-boger/root,buuck/root,jrtomps/root,abhinavmoudgil95/root,mkret2/root,simonpf/root,gbitzes/root,georgtroska/root,satyarth934/root,Duraznos/root,mattkretz/root,agarciamontoro/root,sbinet/cxx-root,omazapa/root,mkret2/root,sbinet/cxx-root,0x0all/ROOT,zzxuanyuan/root-compressor-dummy,esakellari/my_root_for_test,root-mirror/root,evgeny-boger/root,gbitzes/root,Y--/root,lgiommi/root,zzxuanyuan/root-compressor-dummy,thomaskeck/root,evgeny-boger/root,veprbl/root,satyarth934/root,agarciamontoro/root,buuck/root,nilqed/root,evgeny-boger/root,esakellari/my_root_for_test,zzxuanyuan/root-compressor-dummy,BerserkerTroll/root,georgtroska/root,root-mirror/root,dfunke/root,Y--/root,beniz/root,beniz/root,lgiommi/root,gbitzes/root,nilqed/root,satyarth934/root,vukasinmilosevic/root,mattkretz/root,sawenzel/root,beniz/root,alexschlueter/cern-root,root-mirror/root,zzxuanyuan/root,mhuwiler/rootauto,olifre/root,Y--/root,jrtomps/root,satyarth934/root,evgeny-boger/root,smarinac/root,perovic/root,gganis/root,root-mirror/root,olifre/root,dfunke/root,mattkretz/root,esakellari/root,beniz/root,veprbl/root,veprbl/root,sbinet/cxx-root,lgiommi/root,krafczyk/root,root-mirror/root,vukasinmilosevic/root,zzxuanyuan/root-compressor-dummy,jrtomps/root,omazapa/root-old,lgiommi/root,esakellari/my_root_for_test,mhuwiler/rootauto,krafczyk/root,BerserkerTroll/root,abhinavmoudgil95/root,gganis/root,georgtroska/root,pspe/root,omazapa/root-old,mkret2/root,cxx-hep/root-cern,Y--/root,sirinath/root,zzxuanyuan/root,abhinavmoudgil95/root,Duraznos/root,evgeny-boger/root,lgiommi/root,krafczyk/root,cxx-hep/root-cern,nilqed/root,evgeny-boger/root,georgtroska/root,omazapa/root-old,arch1tect0r/root,CristinaCristescu/root,krafczyk/root,Duraznos/root,smarinac/root,Duraznos/root,CristinaCristescu/root,smarinac/root,BerserkerTroll/root,pspe/root,jrtomps/root,vukasinmilosevic/root,abhinavmoudgil95/root,evgeny-boger/root,perovic/root,esakellari/my_root_for_test,vukasinmilosevic/root,BerserkerTroll/root,cxx-hep/root-cern,dfunke/root,smarinac/root,mkret2/root,vukasinmilosevic/root,arch1tect0r/root,krafczyk/root,jrtomps/root,BerserkerTroll/root,simonpf/root,karies/root,georgtroska/root,satyarth934/root,dfunke/root,Duraznos/root,zzxuanyuan/root,lgiommi/root,evgeny-boger/root,simonpf/root,sbinet/cxx-root,arch1tect0r/root,BerserkerTroll/root,vukasinmilosevic/root,thomaskeck/root,beniz/root,davidlt/root,krafczyk/root,cxx-hep/root-cern,krafczyk/root,zzxuanyuan/root,simonpf/root,sbinet/cxx-root,satyarth934/root,smarinac/root,beniz/root,omazapa/root-old,smarinac/root,zzxuanyuan/root-compressor-dummy,esakellari/my_root_for_test,pspe/root,abhinavmoudgil95/root,abhinavmoudgil95/root,davidlt/root,sawenzel/root,arch1tect0r/root,omazapa/root,0x0all/ROOT,gganis/root,Y--/root,sirinath/root,agarciamontoro/root,olifre/root,davidlt/root,gbitzes/root,nilqed/root,gbitzes/root,vukasinmilosevic/root,davidlt/root,dfunke/root,karies/root,arch1tect0r/root,gbitzes/root,arch1tect0r/root,BerserkerTroll/root,root-mirror/root,jrtomps/root,pspe/root,smarinac/root,karies/root,CristinaCristescu/root,gganis/root,krafczyk/root,agarciamontoro/root,esakellari/root,bbockelm/root,jrtomps/root,omazapa/root,thomaskeck/root,zzxuanyuan/root,perovic/root,esakellari/root,simonpf/root,CristinaCristescu/root,nilqed/root,mhuwiler/rootauto,bbockelm/root,sirinath/root,satyarth934/root,alexschlueter/cern-root,agarciamontoro/root,beniz/root,nilqed/root,abhinavmoudgil95/root,evgeny-boger/root,nilqed/root,bbockelm/root,evgeny-boger/root,agarciamontoro/root,0x0all/ROOT,mkret2/root,zzxuanyuan/root,buuck/root,thomaskeck/root,vukasinmilosevic/root,esakellari/my_root_for_test,lgiommi/root,jrtomps/root,BerserkerTroll/root,mkret2/root,sirinath/root,buuck/root,sawenzel/root,gbitzes/root,georgtroska/root,georgtroska/root,buuck/root,jrtomps/root,mkret2/root,arch1tect0r/root,pspe/root,olifre/root,thomaskeck/root,simonpf/root,cxx-hep/root-cern,omazapa/root-old,arch1tect0r/root,alexschlueter/cern-root,bbockelm/root,mattkretz/root,arch1tect0r/root,alexschlueter/cern-root,arch1tect0r/root,zzxuanyuan/root-compressor-dummy,omazapa/root,arch1tect0r/root,Duraznos/root,pspe/root,thomaskeck/root,zzxuanyuan/root-compressor-dummy,davidlt/root,root-mirror/root,sbinet/cxx-root,Duraznos/root,0x0all/ROOT,sawenzel/root,sbinet/cxx-root,pspe/root,georgtroska/root,krafczyk/root,omazapa/root,davidlt/root,lgiommi/root,CristinaCristescu/root,sirinath/root,veprbl/root,mkret2/root,bbockelm/root,zzxuanyuan/root,BerserkerTroll/root,bbockelm/root,pspe/root,gganis/root,Y--/root,CristinaCristescu/root,sawenzel/root,sirinath/root,esakellari/my_root_for_test,abhinavmoudgil95/root,esakellari/my_root_for_test,esakellari/root,Y--/root,mkret2/root,dfunke/root,simonpf/root,abhinavmoudgil95/root,agarciamontoro/root,mhuwiler/rootauto,root-mirror/root,Y--/root,zzxuanyuan/root,0x0all/ROOT,karies/root,mhuwiler/rootauto,Duraznos/root,0x0all/ROOT,georgtroska/root,sirinath/root,zzxuanyuan/root-compressor-dummy,smarinac/root,mattkretz/root,mattkretz/root,karies/root,CristinaCristescu/root,Duraznos/root,olifre/root,root-mirror/root,dfunke/root,vukasinmilosevic/root,dfunke/root,perovic/root,perovic/root,zzxuanyuan/root,olifre/root,sawenzel/root,perovic/root,mhuwiler/rootauto,thomaskeck/root,gganis/root,0x0all/ROOT,sbinet/cxx-root,perovic/root,mhuwiler/rootauto,esakellari/root,gganis/root