add protection against expression=0. Some typo corrections in comments.
add protection against expression=0. Some typo corrections in comments.


git-svn-id: acec3fd5b7ea1eb9e79d6329d318e8118ee2e14f@6790 27541ba8-7e3a-0410-8455-c3a389f83636

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