Compiler warning BrineAir

/data/dumux/dumux/material/fluidsystems/brineair.hh: In static member function 'static constexpr int Dumux::FluidSystems::BrineAir<Scalar, H2Otype, Policy>::BrineAdapterPolicy::compIdx(int) [with Scalar = double; H2Otype = Dumux::Components::H2O<double>; Policy = Dumux::FluidSystems::BrineAirDefaultPolicy<>]':
/data/dumux/dumux/material/fluidsystems/brineair.hh:127:54: warning: statement will never be executed [-Wswitch-unreachable]
                 assert(brineCompIdx == Brine::H2OIdx || brineCompIdx == Brine::NaClIdx);
                        ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~