Use `org-back-to-heading' instead of `outline-back-to-heading'

* lisp/org-agenda.el (org-search-view):
* lisp/org-clock.el (org-with-clock):
(org-clock-jump-to-current-clock):
* lisp/org.el (org-entry-beginning-position): Use `org-back-to-heading'
  instead of `outline-back-to-heading'.

Reported-by: Derek Feichtinger <dfeich@gmail.com>
<http://permalink.gmane.org/gmane.emacs.orgmode/104375>

lisp/org-agenda.el

@@ -4615,7 +4615,7 @@ in `org-agenda-text-search-extra-files'."
 				  (> (org-reduced-level (org-outline-level))
 				     org-agenda-search-view-max-outline-level)
 				  (forward-line -1)
-				  (outline-back-to-heading t)))
+				  (org-back-to-heading t)))
 		      (skip-chars-forward "* ")
 		      (setq beg (point-at-bol)
 			    beg1 (point)

lisp/org-clock.el

@@ -875,7 +875,7 @@ This macro also protects the current active clock from being altered."
 	   (org-clock-effort)
 	   (org-clock-marker (car ,clock))
 	   (org-clock-hd-marker (save-excursion
-				  (outline-back-to-heading t)
+				  (org-back-to-heading t)
 				  (point-marker))))
        ,@forms)))
 (def-edebug-spec org-with-clock (form body))
@@ -960,7 +960,7 @@ If necessary, clock-out of the currently active clock."
 	(org-with-wide-buffer
 	 (let ((drawer-re (format "^[ \t]*:%s:[ \t]*$"
 				  (regexp-quote (if (stringp drawer) drawer "LOGBOOK"))))
-	       (beg (save-excursion (outline-back-to-heading t) (point))))
+	       (beg (save-excursion (org-back-to-heading t) (point))))
 	   (catch 'exit
 	     (while (re-search-backward drawer-re beg t)
 	       (let ((element (org-element-at-point)))

lisp/org.el

@@ -7195,7 +7195,7 @@ open and agenda-wise Org files."
 
 (defsubst org-entry-beginning-position ()
   "Return the beginning position of the current entry."
-  (save-excursion (outline-back-to-heading t) (point)))
+  (save-excursion (org-back-to-heading t) (point)))
 
 (defsubst org-entry-end-position ()
   "Return the end position of the current entry."