From Gerri: fix TFileCollection::Merge() which was progressively duplicating the objects already in the list.
From Gerri:
fix TFileCollection::Merge() which was progressively duplicating the objects already
in the list.



git-svn-id: acec3fd5b7ea1eb9e79d6329d318e8118ee2e14f@41745 27541ba8-7e3a-0410-8455-c3a389f83636

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