[O] Patch for org-clock.el

[Nicolas Calderon]

>From c8979b360749ecd66e298fdbdbc2450668be3a20 Mon Sep 17 00:00:00 2001
From: Nicolas Calderon Asselin <address@hidden>
Date: Wed, 18 Jul 2012 14:58:31 -0400
Subject: [PATCH 2/2] Added checks to determine which idle time to use

* lisp/org-clock.el (org-clock-idle-time): Org-mode assumed that x11idle
  was an available command, and returned an idle time of 0 if it was not
  (never idle). Added checks so that org-idle-time will come from emacs'
  own current-idle-time if x11idle cannot be found or if it cannot
  retrieve the idle time from X11

TINYCHANGE
---
 lisp/org-clock.el |    7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/lisp/org-clock.el b/lisp/org-clock.el
index 162ee07..a913014 100644
--- a/lisp/org-clock.el
+++ b/lisp/org-clock.el
@@ -1010,7 +1010,12 @@ This routine returns a floating point number."
   (cond
    ((eq system-type 'darwin)
     (org-mac-idle-seconds))
-   ((eq window-system 'x)
+   ((and
+     (eq window-system 'x)
+     ;; Check that x11idle exists
+     (eq (call-process-shell-command "command" nil nil nil "-v" "x11idle") 0)
+     ;; Check that x11idle can retrieve the idle time
+     (eq (call-process-shell-command "x11idle" nil nil nil ) 0))
     (org-x11-idle-seconds))
    (t
     (org-emacs-idle-seconds))))
-- 
1.7.10.4