Declare function `org-string-nw-p'.

lisp/org.el

@@ -10859,6 +10859,7 @@ this is used for the GOTO interface."
 	      (org-refile-new-child parent-target child)))
 	(error "Invalid target location")))))
 
+(declare-function org-string-nw-p "org-macs.el" (s))
 (defun org-refile-check-position (refile-pointer)
   "Check if the refile pointer matches the readline to which it points."
   (let* ((file (nth 1 refile-pointer))