[O] [patch] make 'org-save-outline-visibility' return a useful value

[Paul Sexton]

The macro 'org-save-outline-visibility' in org-macs.el seems like 
it should return the value of the last statement in its body (like 
save-excursion and save-restriction do). Instead it discards this
value and returns nothing useful.

The macro is only used in 2 places in the org sources, and its
return value is ignored in both. I feel it would be more useful if 
it returned the value of the last expression in its body. A patch 
to this effect is attached.

Paul



--- C:/Users/paul/org-macs.el   Fri Apr 22 14:57:07 2011
+++ C:/Users/paul/org-macs-new.el       Fri Apr 22 14:56:51 2011
@@ -325,8 +325,9 @@
   (declare (indent 1))
   `(let ((data (org-outline-overlay-data ,use-markers)))
      (unwind-protect
+        (prog1
         (progn
-          ,@body
+               ,@body)
           (org-set-outline-overlay-data data))
        (when ,use-markers
         (mapc (lambda (c)