org-table: Fix 4914f89

* lisp/org-table.el (orgtbl-setup): Fix improper key binding
  specification.

Reported-by: Alex <agrambot@gmail.com>
<http://permalink.gmane.org/gmane.emacs.orgmode/107287>

lisp/org-table.el

@@ -4402,7 +4402,7 @@ to execute outside of tables."
 				     [(shift tab)] [(tab)] "\C-i"))
     (org-defkey orgtbl-mode-map [backspace]
 		(orgtbl-make-binding 'org-delete-backward-char 109
-				     [backspace] [(del)]))
+				     [backspace] (kbd "DEL")))
 
     (unless (featurep 'xemacs)
       (org-defkey orgtbl-mode-map [S-iso-lefttab]