Protect the destructor in case the object has been created with no parent
Protect the destructor in case the object has been created with no parent


git-svn-id: acec3fd5b7ea1eb9e79d6329d318e8118ee2e14f@5218 27541ba8-7e3a-0410-8455-c3a389f83636

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