cd with cdpath not set

[noel@cain.anu.edu.au (Noel Hunt)]

if you don't have a cdpath set, cd fails:

;; echo $cdpath 

;; ls
Audit           calcomp2ps      gwm             postgres        tony
Mace            dead.letter     hershey         pub             txt
News            doc             lib             roman.r         yulan
audio           etc             phaedra         scribe
bin             extro           pine            src
;; cd src
cd src: directory not found
;; cd ./src
;; cd ..
;; cdpath = .
;; cd src
;;