int passed as double to eagle_heium_reionization_extraheat()

Function is defined in cooling_rates.h as:

__attribute__((always_inline)) INLINE double
eagle_helium_reionization_extraheat(
    double z, double delta_z, const struct cooling_function_data *cooling)

It is called in cooling.c as:

const double Helium_reion_heat_cgs = eagle_helium_reionization_extraheat(
      cooling->z_index, delta_redshift, cooling);