add a protection against very small step sizes which can cause nan values in the gradient
add a protection against very small step sizes which can cause nan values in the gradient


git-svn-id: acec3fd5b7ea1eb9e79d6329d318e8118ee2e14f@29749 27541ba8-7e3a-0410-8455-c3a389f83636

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