Keep same column when cycling visibility

Hello,

Like what is already done with drawers, point should not move when
cycling visibility of headings and list items.

The call to `org-back-to-heading' this patch removes seems redundant
anyways.

Regards,

-- Nicolas
>From 17cd55557d747366c90fad47b44edeac2daf920b Mon Sep 17 00:00:00 2001
From: Nicolas Goaziou <n.goaziou@gmail.com>
Date: Sun, 25 Jul 2010 23:14:08 +0200
Subject: [PATCH] Cursor stays at same column when cycling visibility.

* org.el (org-cycle-internal-local): Removed an unnecessary call to
  `org-back-to-heading' that was preventing point to stay at its
  column when cycling visibility.

lisp/org.el

@@ -5849,7 +5849,6 @@ in special contexts.
 
 (defun org-cycle-internal-local ()
   "Do the local cycling action."
-  (org-back-to-heading)
   (let ((goal-column 0) eoh eol eos level has-children children-skipped)
     ;; First, some boundaries
     (save-excursion