fix histo axis title
fix histo axis title

SHornung1/AliPhysics,hzanoli/AliPhysics,rihanphys/AliPhysics,mpuccio/AliPhysics,SHornung1/AliPhysics,pchrista/AliPhysics,victor-gonzalez/AliPhysics,hzanoli/AliPhysics,fcolamar/AliPhysics,lcunquei/AliPhysics,alisw/AliPhysics,rihanphys/AliPhysics,adriansev/AliPhysics,hzanoli/AliPhysics,AMechler/AliPhysics,alisw/AliPhysics,pchrista/AliPhysics,mpuccio/AliPhysics,fbellini/AliPhysics,rbailhac/AliPhysics,pchrista/AliPhysics,adriansev/AliPhysics,adriansev/AliPhysics,fcolamar/AliPhysics,amaringarcia/AliPhysics,alisw/AliPhysics,pchrista/AliPhysics,amaringarcia/AliPhysics,AMechler/AliPhysics,lcunquei/AliPhysics,adriansev/AliPhysics,SHornung1/AliPhysics,rbailhac/AliPhysics,lcunquei/AliPhysics,pchrista/AliPhysics,rihanphys/AliPhysics,adriansev/AliPhysics,alisw/AliPhysics,lcunquei/AliPhysics,fcolamar/AliPhysics,amaringarcia/AliPhysics,nschmidtALICE/AliPhysics,rbailhac/AliPhysics,SHornung1/AliPhysics,fbellini/AliPhysics,rbailhac/AliPhysics,rihanphys/AliPhysics,rbailhac/AliPhysics,victor-gonzalez/AliPhysics,fbellini/AliPhysics,fbellini/AliPhysics,fbellini/AliPhysics,victor-gonzalez/AliPhysics,alisw/AliPhysics,adriansev/AliPhysics,fcolamar/AliPhysics,rbailhac/AliPhysics,alisw/AliPhysics,nschmidtALICE/AliPhysics,AMechler/AliPhysics,AMechler/AliPhysics,amaringarcia/AliPhysics,nschmidtALICE/AliPhysics,mpuccio/AliPhysics,hzanoli/AliPhysics,lcunquei/AliPhysics,SHornung1/AliPhysics,hzanoli/AliPhysics,SHornung1/AliPhysics,nschmidtALICE/AliPhysics,fcolamar/AliPhysics,amaringarcia/AliPhysics,rihanphys/AliPhysics,alisw/AliPhysics,lcunquei/AliPhysics,AMechler/AliPhysics,mpuccio/AliPhysics,victor-gonzalez/AliPhysics,nschmidtALICE/AliPhysics,AMechler/AliPhysics,mpuccio/AliPhysics,pchrista/AliPhysics,adriansev/AliPhysics,rbailhac/AliPhysics,mpuccio/AliPhysics,fbellini/AliPhysics,amaringarcia/AliPhysics,hzanoli/AliPhysics,nschmidtALICE/AliPhysics,rihanphys/AliPhysics,nschmidtALICE/AliPhysics,SHornung1/AliPhysics,fcolamar/AliPhysics,pchrista/AliPhysics,victor-gonzalez/AliPhysics,victor-gonzalez/AliPhysics,lcunquei/AliPhysics,hzanoli/AliPhysics,victor-gonzalez/AliPhysics,fcolamar/AliPhysics,amaringarcia/AliPhysics,rihanphys/AliPhysics,AMechler/AliPhysics,fbellini/AliPhysics,mpuccio/AliPhysics