Count the number of selected evenst in fStatus
Count the number of selected evenst in fStatus

To provide an example for the fix/change for ROOT-748 just committed.

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