Initialise module variables
subroutine init_stellarator_module
!! Initialise module variables
implicit none
first_call = .true.
first_call_stfwbs = .true.
f_n = 0.0D0
f_r = 0.0D0
f_a = 0.0D0
f_b = 0.0D0
f_i = 0.0D0
end subroutine init_stellarator_module