From Axel Naumann: THtml sigsegvs when encountering a class with an unknown base class, trying to build the inheritance diagram. This fixes it.
From Axel Naumann:
THtml sigsegvs when encountering a class with an unknown base class,
trying to build the inheritance diagram. This fixes it.


git-svn-id: acec3fd5b7ea1eb9e79d6329d318e8118ee2e14f@9360 27541ba8-7e3a-0410-8455-c3a389f83636

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