org.el: Display a message when no clock is active.

* org-clock.el (org-clock-modify-effort-estimate): Display a
message when no clock is currently active.

TINYCHANGE

lisp/org-clock.el

@@ -588,39 +588,40 @@ previous clocking intervals."
     (+ currently-clocked-time (or org-clock-total-time 0))))
 
 (defun org-clock-modify-effort-estimate (&optional value)
- "Add to or set the effort estimate of the item currently being clocked.
+  "Add to or set the effort estimate of the item currently being clocked.
 VALUE can be a number of minutes, or a string with format hh:mm or mm.
 When the string starts with a + or a - sign, the current value of the effort
 property will be changed by that amount.
 This will update the \"Effort\" property of currently clocked item, and
 the mode line."
- (interactive)
- (when (org-clock-is-active)
-   (let ((current org-clock-effort) sign)
-     (unless value
-       ;; Prompt user for a value or a change
-       (setq value
-	     (read-string
-	      (format "Set effort (hh:mm or mm%s): "
-		      (if current
-			  (format ", prefix + to add to %s" org-clock-effort)
-			"")))))
-     (when (stringp value)
-       ;; A string.  See if it is a delta
-       (setq sign (string-to-char value))
-       (if (member sign '(?- ?+))
-	   (setq current (org-duration-string-to-minutes current)
-		 value (substring value 1))
-	 (setq current 0))
-       (setq value (org-duration-string-to-minutes value))
-       (if (equal ?- sign)
-	   (setq value (- current value))
-	 (if (equal ?+ sign) (setq value (+ current value)))))
-     (setq value (max 0 value)
-	   org-clock-effort (org-minutes-to-hh:mm-string value))
-     (org-entry-put org-clock-marker "Effort" org-clock-effort)
-     (org-clock-update-mode-line)
-     (message "Effort is now %s" org-clock-effort))))
+  (interactive)
+  (if (org-clock-is-active)
+      (let ((current org-clock-effort) sign)
+	(unless value
+	  ;; Prompt user for a value or a change
+	  (setq value
+		(read-string
+		 (format "Set effort (hh:mm or mm%s): "
+			 (if current
+			     (format ", prefix + to add to %s" org-clock-effort)
+			   "")))))
+	(when (stringp value)
+	  ;; A string.  See if it is a delta
+	  (setq sign (string-to-char value))
+	  (if (member sign '(?- ?+))
+	      (setq current (org-duration-string-to-minutes current)
+		    value (substring value 1))
+	    (setq current 0))
+	  (setq value (org-duration-string-to-minutes value))
+	  (if (equal ?- sign)
+	      (setq value (- current value))
+	    (if (equal ?+ sign) (setq value (+ current value)))))
+	(setq value (max 0 value)
+	      org-clock-effort (org-minutes-to-hh:mm-string value))
+	(org-entry-put org-clock-marker "Effort" org-clock-effort)
+	(org-clock-update-mode-line)
+	(message "Effort is now %s" org-clock-effort))
+    (message "Clock is not currently active")))
 
 (defvar org-clock-notification-was-shown nil
   "Shows if we have shown notification already.")