Update error codes for HK table interpolation

function interpol_param, table, par_name, date, empty_params = empty_params

	if not keyword_set(empty_params) then empty_params = !null

	s = where(table.par_name eq par_name, n)

	if n eq 0 then return, 0.0

	if n eq 0 then begin

		journal, 'Error 01: parameter not found in house-keeping table.'

		journal

		exit, status = 1

	endif

	if n eq 1 then begin

		journal, 'Error 02: insufficient number of parameter values in house-keeping table.'

		journal

		exit, status = 2

	endif

	par_time = table.gen_time[s]

	par_val = table.eng_val[s]

	par_date = dblarr(n)

	par_date = par_date[s]

	jul_date = date_conv(date, 'JULIAN')

	if jul_date ge min(par_date) and jul_date le max(par_date) then value = interpol(float(par_val), par_date, jul_date) else begin

		; value = 0.0

		journal, 'Error 01: parameter not found in house-keeping dump table.'

		journal, 'Error 02: insufficient number of parameter values in house-keeping table.'

		journal

		exit, status = 1

	endelse

	if finite(value) then return, value else return, 0.0

	if finite(value) then return, value else begin

	  	journal, 'Error 03: interpolation of HK parameter ' + par_name.trim() + ' failed.'

		journal

		exit, status = 3

	endif

end