[ntuple] Fix use of Char, Byte, Int8 columns
[ntuple] Fix use of Char, Byte, Int8 columns

olifre/root,olifre/root,olifre/root,olifre/root,olifre/root,olifre/root,olifre/root,olifre/root,olifre/root,olifre/root,olifre/root