Errata on p.431

[S Sridhar <sridhar%tekchips%tektronix.csnet@CSNET-RELAY.ARPA>]

There are two mistakes in the first example on p.431.
The function cerror in both places has an argument vals missing.
In the first half of the example:
 (cerror "Assume .............
 	  .....................
	  but ~R ~:[were~;was~] supplied."
          nvals (= nvals 1))
The last 2 args should be replaced by the three args:
 vals nvals (= nvals 1)

Similarly in the second cerror function, after the line
	but ~R were supplied."
the line 
 	 nvals)
should be replaced by
	vals nvals)

--sridhar