Fix I/O for TF1 from C++ functions (fix for ROOT-7157)
Fix I/O for TF1 from C++ functions (fix for ROOT-7157)

sbinet/cxx-root,bbockelm/root,olifre/root,root-mirror/root,olifre/root,thomaskeck/root,CristinaCristescu/root,bbockelm/root,simonpf/root,satyarth934/root,buuck/root,Y--/root,gganis/root,nilqed/root,sbinet/cxx-root,olifre/root,buuck/root,buuck/root,sirinath/root,perovic/root,zzxuanyuan/root,thomaskeck/root,gbitzes/root,nilqed/root,abhinavmoudgil95/root,simonpf/root,sbinet/cxx-root,krafczyk/root,satyarth934/root,evgeny-boger/root,CristinaCristescu/root,sbinet/cxx-root,georgtroska/root,agarciamontoro/root,agarciamontoro/root,vukasinmilosevic/root,satyarth934/root,gbitzes/root,georgtroska/root,mhuwiler/rootauto,Duraznos/root,evgeny-boger/root,Y--/root,evgeny-boger/root,Duraznos/root,olifre/root,jrtomps/root,davidlt/root,pspe/root,krafczyk/root,bbockelm/root,sawenzel/root,mkret2/root,lgiommi/root,Duraznos/root,perovic/root,gbitzes/root,Duraznos/root,abhinavmoudgil95/root,abhinavmoudgil95/root,abhinavmoudgil95/root,BerserkerTroll/root,lgiommi/root,mkret2/root,zzxuanyuan/root,gganis/root,gganis/root,zzxuanyuan/root-compressor-dummy,mkret2/root,nilqed/root,sbinet/cxx-root,sirinath/root,zzxuanyuan/root-compressor-dummy,buuck/root,arch1tect0r/root,esakellari/root,bbockelm/root,esakellari/root,mkret2/root,nilqed/root,nilqed/root,beniz/root,sawenzel/root,gbitzes/root,buuck/root,root-mirror/root,pspe/root,evgeny-boger/root,simonpf/root,davidlt/root,omazapa/root,karies/root,bbockelm/root,mkret2/root,Duraznos/root,sirinath/root,mattkretz/root,zzxuanyuan/root-compressor-dummy,esakellari/root,jrtomps/root,veprbl/root,nilqed/root,mhuwiler/rootauto,olifre/root,jrtomps/root,bbockelm/root,sbinet/cxx-root,veprbl/root,mhuwiler/rootauto,jrtomps/root,perovic/root,mkret2/root,vukasinmilosevic/root,BerserkerTroll/root,satyarth934/root,CristinaCristescu/root,perovic/root,evgeny-boger/root,krafczyk/root,evgeny-boger/root,omazapa/root,sawenzel/root,arch1tect0r/root,esakellari/root,vukasinmilosevic/root,thomaskeck/root,arch1tect0r/root,Y--/root,perovic/root,dfunke/root,gbitzes/root,beniz/root,simonpf/root,gbitzes/root,mhuwiler/rootauto,BerserkerTroll/root,sirinath/root,olifre/root,esakellari/root,sawenzel/root,arch1tect0r/root,lgiommi/root,vukasinmilosevic/root,bbockelm/root,simonpf/root,abhinavmoudgil95/root,lgiommi/root,dfunke/root,karies/root,omazapa/root,arch1tect0r/root,georgtroska/root,Duraznos/root,bbockelm/root,vukasinmilosevic/root,buuck/root,sbinet/cxx-root,pspe/root,beniz/root,BerserkerTroll/root,veprbl/root,zzxuanyuan/root,krafczyk/root,georgtroska/root,sawenzel/root,CristinaCristescu/root,sirinath/root,abhinavmoudgil95/root,davidlt/root,krafczyk/root,gbitzes/root,buuck/root,evgeny-boger/root,buuck/root,beniz/root,georgtroska/root,georgtroska/root,pspe/root,zzxuanyuan/root,mkret2/root,gganis/root,simonpf/root,karies/root,Duraznos/root,perovic/root,olifre/root,BerserkerTroll/root,abhinavmoudgil95/root,olifre/root,BerserkerTroll/root,pspe/root,CristinaCristescu/root,pspe/root,mhuwiler/rootauto,bbockelm/root,perovic/root,buuck/root,dfunke/root,dfunke/root,omazapa/root,perovic/root,simonpf/root,zzxuanyuan/root,root-mirror/root,krafczyk/root,olifre/root,zzxuanyuan/root,thomaskeck/root,gganis/root,dfunke/root,dfunke/root,beniz/root,root-mirror/root,pspe/root,vukasinmilosevic/root,pspe/root,zzxuanyuan/root,sawenzel/root,veprbl/root,satyarth934/root,jrtomps/root,jrtomps/root,arch1tect0r/root,esakellari/root,dfunke/root,beniz/root,karies/root,mattkretz/root,omazapa/root,jrtomps/root,davidlt/root,davidlt/root,karies/root,beniz/root,sirinath/root,thomaskeck/root,gganis/root,mhuwiler/rootauto,abhinavmoudgil95/root,karies/root,esakellari/root,Duraznos/root,esakellari/root,davidlt/root,davidlt/root,gganis/root,zzxuanyuan/root-compressor-dummy,krafczyk/root,mattkretz/root,gbitzes/root,zzxuanyuan/root-compressor-dummy,zzxuanyuan/root-compressor-dummy,agarciamontoro/root,gbitzes/root,thomaskeck/root,sirinath/root,satyarth934/root,mattkretz/root,omazapa/root,agarciamontoro/root,karies/root,omazapa/root,sawenzel/root,arch1tect0r/root,gganis/root,mattkretz/root,mattkretz/root,georgtroska/root,abhinavmoudgil95/root,simonpf/root,Y--/root,mhuwiler/rootauto,jrtomps/root,karies/root,vukasinmilosevic/root,bbockelm/root,simonpf/root,sbinet/cxx-root,jrtomps/root,BerserkerTroll/root,mhuwiler/rootauto,olifre/root,agarciamontoro/root,root-mirror/root,root-mirror/root,root-mirror/root,CristinaCristescu/root,sawenzel/root,Y--/root,lgiommi/root,Y--/root,arch1tect0r/root,krafczyk/root,omazapa/root,beniz/root,sirinath/root,root-mirror/root,thomaskeck/root,davidlt/root,veprbl/root,pspe/root,lgiommi/root,Y--/root,satyarth934/root,lgiommi/root,thomaskeck/root,lgiommi/root,sbinet/cxx-root,gganis/root,sirinath/root,vukasinmilosevic/root,omazapa/root,evgeny-boger/root,mhuwiler/rootauto,zzxuanyuan/root,veprbl/root,veprbl/root,CristinaCristescu/root,perovic/root,georgtroska/root,mkret2/root,thomaskeck/root,jrtomps/root,abhinavmoudgil95/root,sawenzel/root,agarciamontoro/root,mattkretz/root,zzxuanyuan/root,mhuwiler/rootauto,perovic/root,omazapa/root,nilqed/root,beniz/root,esakellari/root,karies/root,agarciamontoro/root,lgiommi/root,zzxuanyuan/root,lgiommi/root,sirinath/root,gganis/root,gbitzes/root,BerserkerTroll/root,mattkretz/root,Y--/root,karies/root,root-mirror/root,buuck/root,olifre/root,abhinavmoudgil95/root,pspe/root,evgeny-boger/root,mkret2/root,sirinath/root,pspe/root,evgeny-boger/root,agarciamontoro/root,veprbl/root,satyarth934/root,mkret2/root,agarciamontoro/root,georgtroska/root,beniz/root,arch1tect0r/root,agarciamontoro/root,zzxuanyuan/root-compressor-dummy,zzxuanyuan/root-compressor-dummy,BerserkerTroll/root,CristinaCristescu/root,root-mirror/root,nilqed/root,bbockelm/root,veprbl/root,dfunke/root,zzxuanyuan/root,Y--/root,lgiommi/root,gganis/root,zzxuanyuan/root-compressor-dummy,vukasinmilosevic/root,simonpf/root,krafczyk/root,agarciamontoro/root,thomaskeck/root,davidlt/root,georgtroska/root,karies/root,perovic/root,sawenzel/root,zzxuanyuan/root-compressor-dummy,root-mirror/root,zzxuanyuan/root,CristinaCristescu/root,sbinet/cxx-root,sawenzel/root,satyarth934/root,nilqed/root,sbinet/cxx-root,mattkretz/root,evgeny-boger/root,vukasinmilosevic/root,Y--/root,krafczyk/root,mattkretz/root,jrtomps/root,Duraznos/root,davidlt/root,gbitzes/root,satyarth934/root,nilqed/root,zzxuanyuan/root-compressor-dummy,Y--/root,Duraznos/root,dfunke/root,veprbl/root,satyarth934/root,arch1tect0r/root,davidlt/root,veprbl/root,esakellari/root,arch1tect0r/root,simonpf/root,krafczyk/root,Duraznos/root,BerserkerTroll/root,CristinaCristescu/root,mhuwiler/rootauto,vukasinmilosevic/root,omazapa/root,dfunke/root,buuck/root,georgtroska/root,nilqed/root,CristinaCristescu/root,mattkretz/root,esakellari/root,BerserkerTroll/root,mkret2/root,beniz/root,dfunke/root