long 32/64 bit warnings when filling tuples

When using NINTREE to make a tuple we get warnings about longs: i.e.

SpruceQEE_diSVTag1010_ntp           WARNING FunTupleBase<Gaudi::NamedRange_<std::vector<LHCb::Particle const*,std::allocator<LHCb::Particle const*> >,__gnu_cxx::__normal_iterator<LHCb::Particle const* const*,std::vector<LHCb::Particle const*,std::allocator<LHCb::Particle const*> > > > >:: Tuple 'DecayTree' 'long' has different sizes on 32/64 bit systems. Casting 'Jet1_nChargedCons' to 'long long'

A minimal example

           "nCons": F.NINGENERATION(F.ALL, 1),