delta_time_history

	num_returned.i4.v = delta_time_history(max_return.i4.v, times.r8a.r)

	This function will return a history of delta time values
	in seconds that were generated by prior calls to "delta_time".

	max_return	maximum number of times to return
	times		returned times in seconds

	This function returns status values as follows:

	number of returned times

	This function requires the following include files:

	clib_h

	Related functions:

	delta_time, delta_time_history_private, delta_time_allocate,
	delta_time_free, delta_time_private

	C/C++ usage:

	int	num_returned;
	int	max_return = NUM_TIMES;
	double	times[NUM_TIMES];

	num_returned = delta_time_history(max_return,times);