Add a few protections in case two Hbook files containing the same histogram IDs are open and the IDs read in memory.
Add a few protections in case two Hbook files containing the same histogram IDs
are open and the IDs read in memory.


git-svn-id: acec3fd5b7ea1eb9e79d6329d318e8118ee2e14f@5504 27541ba8-7e3a-0410-8455-c3a389f83636

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