org-table.el: Fix setting of constants.

* org.el (org-set-regexps-and-options): Use
`org-table-set-constants'.

* org-table.el (org-table-set-constants): New function.
(orgtbl-ctrl-c-ctrl-c): Use it.

Thanks to Oliver Večerník for reporting problems here.

lisp/org-table.el

@@ -2958,6 +2958,24 @@ list, 'literal is for the format specifier L."
 		   elements
 		   ",") "]"))))
 
+;;;###autoload
+(defun org-table-set-constants ()
+  "Set `org-table-formula-constants-local' in the current buffer."
+  (let (cst consts const-str)
+    (save-excursion
+      (goto-char (point-min))
+      (while (re-search-forward "^[ \t]*#\\+CONSTANTS: \\(.*\\)" nil t)
+	(setq const-str (substring-no-properties (match-string 1)))
+	(setq consts (append consts (org-split-string const-str "[ \t]+")))
+	(when consts
+	  (let (e)
+	    (while (setq e (pop consts))
+	      (when (string-match "^\\([a-zA-Z0][_a-zA-Z0-9]*\\)=\\(.*\\)" e)
+		(if (assoc-string (match-string 1 e) cst)
+		    (setq cst (delete (assoc-string (match-string 1 e) cst) cst)))
+		(push (cons (match-string 1 e) (match-string 2 e)) cst)))
+	    (setq org-table-formula-constants-local cst)))))))
+
 ;;;###autoload
 (defun org-table-recalculate (&optional all noalign)
   "Recalculate the current table line by applying all stored formulas.
@@ -4243,7 +4261,7 @@ to execute outside of tables."
 If it is a table to be sent away to a receiver, do it.
 With prefix arg, also recompute table."
   (interactive "P")
-  (let ((case-fold-search t) (pos (point)) action consts-str consts cst const-str)
+  (let ((case-fold-search t) (pos (point)) action)
     (save-excursion
       (beginning-of-line 1)
       (setq action (cond
@@ -4261,17 +4279,7 @@ With prefix arg, also recompute table."
       (when (orgtbl-send-table 'maybe)
 	(run-hooks 'orgtbl-after-send-table-hook)))
      ((eq action 'recalc)
-      (save-excursion
-	(goto-char (point-min))
-	(while (re-search-forward "^[ \t]*#\\+CONSTANTS: \\(.*\\)" nil t)
-	  (setq const-str (substring-no-properties (match-string 1)))
-	  (setq consts (append consts (org-split-string const-str "[ \t]+")))
-	  (when consts
-	    (let (e)
-	      (while (setq e (pop consts))
-		(if (string-match "^\\([a-zA-Z0][_a-zA-Z0-9]*\\)=\\(.*\\)" e)
-		    (push (cons (match-string 1 e) (match-string 2 e)) cst)))
-	      (setq org-table-formula-constants-local cst)))))
+      (org-table-set-constants)
       (save-excursion
 	(beginning-of-line 1)
 	(skip-chars-backward " \r\n\t")

lisp/org.el

@@ -4804,7 +4804,7 @@ but the stars and the body are.")
 	     ((equal key "DRAWERS")
 	      (setq drawers (delete-dups (append org-drawers (org-split-string value splitre)))))
 	     ((equal key "CONSTANTS")
-	      (setq const (append const (org-split-string value splitre))))
+	      (org-table-set-constants))
 	     ((equal key "STARTUP")
 	      (let ((opts (org-split-string value splitre))
 		    l var val)
@@ -4908,13 +4908,6 @@ but the stars and the body are.")
 	      org-todo-kwd-alist (nreverse org-todo-kwd-alist)
 	      org-todo-key-trigger (delq nil (mapcar 'cdr org-todo-key-alist))
 	      org-todo-key-alist (org-assign-fast-keys org-todo-key-alist)))
-      ;; Process the constants
-      (when const
-	(let (e cst)
-	  (while (setq e (pop const))
-	    (if (string-match "^\\([a-zA-Z0][_a-zA-Z0-9]*\\)=\\(.*\\)" e)
-		(push (cons (match-string 1 e) (match-string 2 e)) cst)))
-	  (setq org-table-formula-constants-local cst)))
 
       ;; Process the tags.
       (when tags