use TMath::Poisson instead of implementing the Poisson probability (fix suggested in https://savannah.cern.ch/bugs/?27788
use TMath::Poisson instead of implementing the Poisson probability (fix suggested in https://savannah.cern.ch/bugs/?27788


git-svn-id: acec3fd5b7ea1eb9e79d6329d318e8118ee2e14f@21355 27541ba8-7e3a-0410-8455-c3a389f83636

sawenzel/root,cxx-hep/root-cern,arch1tect0r/root,omazapa/root-old,sbinet/cxx-root,smarinac/root,abhinavmoudgil95/root,omazapa/root,kirbyherm/root-r-tools,CristinaCristescu/root,Dr15Jones/root,lgiommi/root,gganis/root,beniz/root,simonpf/root,BerserkerTroll/root,BerserkerTroll/root,cxx-hep/root-cern,nilqed/root,agarciamontoro/root,alexschlueter/cern-root,zzxuanyuan/root,perovic/root,mhuwiler/rootauto,sawenzel/root,BerserkerTroll/root,mhuwiler/rootauto,evgeny-boger/root,krafczyk/root,thomaskeck/root,nilqed/root,BerserkerTroll/root,jrtomps/root,beniz/root,mkret2/root,evgeny-boger/root,omazapa/root,smarinac/root,root-mirror/root,bbockelm/root,simonpf/root,omazapa/root-old,arch1tect0r/root,mkret2/root,evgeny-boger/root,olifre/root,0x0all/ROOT,esakellari/root,dfunke/root,sawenzel/root,georgtroska/root,arch1tect0r/root,lgiommi/root,BerserkerTroll/root,sbinet/cxx-root,perovic/root,davidlt/root,omazapa/root,smarinac/root,satyarth934/root,smarinac/root,ffurano/root5,nilqed/root,mkret2/root,mattkretz/root,CristinaCristescu/root,Dr15Jones/root,root-mirror/root,simonpf/root,karies/root,arch1tect0r/root,buuck/root,sirinath/root,lgiommi/root,karies/root,strykejern/TTreeReader,tc3t/qoot,Duraznos/root,krafczyk/root,olifre/root,pspe/root,esakellari/root,Y--/root,agarciamontoro/root,pspe/root,olifre/root,krafczyk/root,krafczyk/root,georgtroska/root,zzxuanyuan/root-compressor-dummy,beniz/root,jrtomps/root,karies/root,tc3t/qoot,zzxuanyuan/root,esakellari/my_root_for_test,sirinath/root,omazapa/root-old,bbockelm/root,esakellari/my_root_for_test,jrtomps/root,ffurano/root5,jrtomps/root,0x0all/ROOT,omazapa/root,root-mirror/root,dfunke/root,zzxuanyuan/root,bbockelm/root,esakellari/root,thomaskeck/root,esakellari/root,lgiommi/root,arch1tect0r/root,Duraznos/root,sirinath/root,davidlt/root,thomaskeck/root,dfunke/root,simonpf/root,jrtomps/root,root-mirror/root,sbinet/cxx-root,abhinavmoudgil95/root,ffurano/root5,vukasinmilosevic/root,pspe/root,buuck/root,perovic/root,sbinet/cxx-root,lgiommi/root,zzxuanyuan/root-compressor-dummy,simonpf/root,satyarth934/root,georgtroska/root,mkret2/root,mhuwiler/rootauto,beniz/root,cxx-hep/root-cern,thomaskeck/root,abhinavmoudgil95/root,Y--/root,mhuwiler/rootauto,gganis/root,sirinath/root,cxx-hep/root-cern,krafczyk/root,arch1tect0r/root,esakellari/my_root_for_test,zzxuanyuan/root,root-mirror/root,lgiommi/root,omazapa/root-old,smarinac/root,olifre/root,vukasinmilosevic/root,mhuwiler/rootauto,0x0all/ROOT,sawenzel/root,bbockelm/root,sawenzel/root,CristinaCristescu/root,beniz/root,root-mirror/root,krafczyk/root,vukasinmilosevic/root,omazapa/root,nilqed/root,lgiommi/root,mhuwiler/rootauto,zzxuanyuan/root-compressor-dummy,gbitzes/root,karies/root,bbockelm/root,georgtroska/root,nilqed/root,lgiommi/root,mhuwiler/rootauto,tc3t/qoot,davidlt/root,abhinavmoudgil95/root,mattkretz/root,cxx-hep/root-cern,georgtroska/root,mattkretz/root,0x0all/ROOT,zzxuanyuan/root-compressor-dummy,strykejern/TTreeReader,perovic/root,gbitzes/root,kirbyherm/root-r-tools,Y--/root,root-mirror/root,Duraznos/root,thomaskeck/root,tc3t/qoot,tc3t/qoot,davidlt/root,davidlt/root,gganis/root,sawenzel/root,zzxuanyuan/root-compressor-dummy,mkret2/root,satyarth934/root,mhuwiler/rootauto,smarinac/root,sirinath/root,sbinet/cxx-root,bbockelm/root,gbitzes/root,gbitzes/root,gganis/root,veprbl/root,omazapa/root-old,mhuwiler/rootauto,karies/root,Duraznos/root,alexschlueter/cern-root,agarciamontoro/root,krafczyk/root,smarinac/root,pspe/root,thomaskeck/root,georgtroska/root,davidlt/root,arch1tect0r/root,omazapa/root,Dr15Jones/root,Y--/root,Duraznos/root,simonpf/root,satyarth934/root,georgtroska/root,satyarth934/root,CristinaCristescu/root,Duraznos/root,abhinavmoudgil95/root,davidlt/root,zzxuanyuan/root-compressor-dummy,Dr15Jones/root,gbitzes/root,Y--/root,simonpf/root,BerserkerTroll/root,perovic/root,simonpf/root,esakellari/root,gganis/root,buuck/root,abhinavmoudgil95/root,buuck/root,georgtroska/root,gganis/root,simonpf/root,dfunke/root,krafczyk/root,dfunke/root,omazapa/root,esakellari/my_root_for_test,bbockelm/root,sbinet/cxx-root,zzxuanyuan/root,davidlt/root,evgeny-boger/root,olifre/root,thomaskeck/root,sirinath/root,alexschlueter/cern-root,smarinac/root,dfunke/root,pspe/root,buuck/root,buuck/root,abhinavmoudgil95/root,sirinath/root,agarciamontoro/root,esakellari/my_root_for_test,gbitzes/root,arch1tect0r/root,0x0all/ROOT,veprbl/root,sawenzel/root,vukasinmilosevic/root,Y--/root,ffurano/root5,buuck/root,bbockelm/root,omazapa/root-old,omazapa/root-old,pspe/root,sbinet/cxx-root,nilqed/root,mattkretz/root,agarciamontoro/root,pspe/root,simonpf/root,zzxuanyuan/root,davidlt/root,karies/root,krafczyk/root,vukasinmilosevic/root,karies/root,buuck/root,vukasinmilosevic/root,perovic/root,evgeny-boger/root,mkret2/root,mattkretz/root,gbitzes/root,zzxuanyuan/root,abhinavmoudgil95/root,veprbl/root,gganis/root,davidlt/root,mattkretz/root,zzxuanyuan/root,nilqed/root,zzxuanyuan/root,omazapa/root,mkret2/root,cxx-hep/root-cern,root-mirror/root,sbinet/cxx-root,omazapa/root-old,BerserkerTroll/root,tc3t/qoot,smarinac/root,gbitzes/root,beniz/root,0x0all/ROOT,esakellari/my_root_for_test,kirbyherm/root-r-tools,esakellari/my_root_for_test,evgeny-boger/root,strykejern/TTreeReader,mkret2/root,jrtomps/root,sirinath/root,abhinavmoudgil95/root,esakellari/root,abhinavmoudgil95/root,georgtroska/root,dfunke/root,perovic/root,CristinaCristescu/root,satyarth934/root,BerserkerTroll/root,thomaskeck/root,ffurano/root5,Duraznos/root,evgeny-boger/root,veprbl/root,jrtomps/root,sirinath/root,agarciamontoro/root,nilqed/root,root-mirror/root,omazapa/root-old,mkret2/root,alexschlueter/cern-root,sirinath/root,esakellari/root,simonpf/root,sawenzel/root,gbitzes/root,lgiommi/root,gganis/root,nilqed/root,omazapa/root-old,esakellari/my_root_for_test,CristinaCristescu/root,Duraznos/root,cxx-hep/root-cern,omazapa/root,strykejern/TTreeReader,vukasinmilosevic/root,zzxuanyuan/root-compressor-dummy,krafczyk/root,zzxuanyuan/root-compressor-dummy,nilqed/root,zzxuanyuan/root-compressor-dummy,dfunke/root,0x0all/ROOT,satyarth934/root,beniz/root,esakellari/root,gbitzes/root,arch1tect0r/root,kirbyherm/root-r-tools,vukasinmilosevic/root,mkret2/root,CristinaCristescu/root,CristinaCristescu/root,0x0all/ROOT,satyarth934/root,bbockelm/root,sawenzel/root,karies/root,zzxuanyuan/root,lgiommi/root,evgeny-boger/root,karies/root,Duraznos/root,zzxuanyuan/root-compressor-dummy,buuck/root,veprbl/root,nilqed/root,Dr15Jones/root,alexschlueter/cern-root,perovic/root,abhinavmoudgil95/root,georgtroska/root,strykejern/TTreeReader,agarciamontoro/root,Y--/root,agarciamontoro/root,ffurano/root5,pspe/root,Duraznos/root,omazapa/root-old,veprbl/root,BerserkerTroll/root,beniz/root,jrtomps/root,zzxuanyuan/root,CristinaCristescu/root,CristinaCristescu/root,bbockelm/root,agarciamontoro/root,esakellari/root,olifre/root,veprbl/root,mattkretz/root,buuck/root,Y--/root,smarinac/root,satyarth934/root,alexschlueter/cern-root,esakellari/root,veprbl/root,root-mirror/root,strykejern/TTreeReader,vukasinmilosevic/root,arch1tect0r/root,gganis/root,beniz/root,mattkretz/root,satyarth934/root,CristinaCristescu/root,tc3t/qoot,arch1tect0r/root,strykejern/TTreeReader,veprbl/root,dfunke/root,sawenzel/root,mattkretz/root,Dr15Jones/root,sirinath/root,root-mirror/root,sbinet/cxx-root,tc3t/qoot,kirbyherm/root-r-tools,mattkretz/root,veprbl/root,evgeny-boger/root,sbinet/cxx-root,karies/root,pspe/root,jrtomps/root,zzxuanyuan/root,satyarth934/root,buuck/root,0x0all/ROOT,ffurano/root5,beniz/root,gganis/root,olifre/root,vukasinmilosevic/root,olifre/root,lgiommi/root,georgtroska/root,zzxuanyuan/root-compressor-dummy,davidlt/root,pspe/root,gbitzes/root,esakellari/my_root_for_test,tc3t/qoot,thomaskeck/root,jrtomps/root,agarciamontoro/root,kirbyherm/root-r-tools,thomaskeck/root,bbockelm/root,tc3t/qoot,alexschlueter/cern-root,evgeny-boger/root,kirbyherm/root-r-tools,Y--/root,cxx-hep/root-cern,BerserkerTroll/root,sawenzel/root,jrtomps/root,gganis/root,krafczyk/root,karies/root,Dr15Jones/root,olifre/root,Y--/root,beniz/root,olifre/root,esakellari/my_root_for_test,agarciamontoro/root,mhuwiler/rootauto,olifre/root,Duraznos/root,perovic/root,mhuwiler/rootauto,omazapa/root,mkret2/root,perovic/root,BerserkerTroll/root,dfunke/root,dfunke/root,Y--/root,omazapa/root,sbinet/cxx-root,pspe/root,evgeny-boger/root,perovic/root,veprbl/root,esakellari/root,mattkretz/root,vukasinmilosevic/root