[O] malformed function

[hymie!]

Greetings.

I know this is technically an emacs problem and not an Orgmode problem,
but maybe you guys will see the error that I can't find.

I have two different machines.  One is a Linux machine running
Orgmode 9.1.13 under Emacs 25.3.1 , and one is a Windows 10 machine
running Orgmode 9.1.13 under Emacs 24.5.1 .  Both have the same .emacs
file as far as I can tell.

The Linux machine is getting this error:

Warning (bytecomp): ‘(extract-window (line) (let ((start
(get-text-property 1 (quote time-of-day) line)) (dur (get-text-property
1 (quote duration) line))) (cond ((and start dur) (cons start
(org-time-from-minutes (+ dur (org-time-to-minutes start))))) (start
start) (t nil))))’ is a malformed function

As far as I can tell, the parens and quotes are all matched properly, and
the Windows machine is not displaying this error.

Here is the relevant part of my .emacs file.  Maybe you guys can see the
error I don't see?

===== 8< =====
; http://orgmode.org/worg/org-hacks.html
(defun org-time-to-minutes (time)
  "Convert an HHMM time to minutes"
  (+ (* (/ time 100) 60) (% time 100)))
(defun org-time-from-minutes (minutes)
  "Convert a number of minutes to an HHMM time"
  (+ (* (/ minutes 60) 100) (% minutes 60)))
(defadvice org-agenda-add-time-grid-maybe (around mde-org-agenda-grid-tweakify
                                                  (list ndays todayp))
  (if (member 'remove-match (car org-agenda-time-grid))
      (flet ((extract-window
              (line)
              (let ((start (get-text-property 1 'time-of-day line))
                    (dur (get-text-property 1 'duration line)))
                (cond
                 ((and start dur)
                  (cons start
                        (org-time-from-minutes
                         (+ dur (org-time-to-minutes start)))))
                 (start start)
                 (t nil)))))
        (let* ((windows (delq nil (mapcar 'extract-window list)))
               (org-agenda-time-grid
                (list (car org-agenda-time-grid)
                      (cadr org-agenda-time-grid)
                      (remove-if
                       (lambda (time)
                         (find-if (lambda (w)
                                    (if (numberp w)
                                        (equal w time)
                                      (and (>= time (car w))
                                           (< time (cdr w)))))
                                  windows))
                       (caddr org-agenda-time-grid)))))
          ad-do-it))
    ad-do-it))
(ad-activate 'org-agenda-add-time-grid-maybe)
===== 8< =====

Thanks.

--hymie!     http://lactose.homelinux.net/~hymie    hy...@lactose.homelinux.net