2 EMU_TIMEDIFF  
 Calculate the difference between 2 absolute times and return the 
 difference in seconds.
3 Inputs
	.address of .quad time1
	.address of .quad time2
	.address of .long number of seconds between time1 and time2
3 Outputs
	P3 is set to the integer number of seconds between the
	two times. 
3 Returns
	SS$_NORMAL	OK 
	Any return from LIB$SUB_TIMES
 (Time1 must be later or = time2)
