Protect the TBox destructor when fTip is null or/and gPad invalid.
Protect the TBox destructor when fTip is null or/and gPad invalid.


git-svn-id: acec3fd5b7ea1eb9e79d6329d318e8118ee2e14f@13375 27541ba8-7e3a-0410-8455-c3a389f83636

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