t_lambda.x
	Changed IM_LEN macro imgeti() procedure, and removed
	include of imhdr.h file (PG 11/apr/90).

t_lambda.x
	Added convert parameter to disable the conversion of wavelengths from
	meters to Angstroms. This is neccessary to deal with images with
	wavelengths in microns (PG 03/Sep/92).
