Add protections in TFormula::EvalPar when evaluating expressions (gaus, xygaus) where the variable at the denominator may be null.
Add protections in TFormula::EvalPar when evaluating expressions (gaus, xygaus) where
the variable at the denominator may be null.


git-svn-id: acec3fd5b7ea1eb9e79d6329d318e8118ee2e14f@2763 27541ba8-7e3a-0410-8455-c3a389f83636

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