Fix placing capture items at beginning of buffer.

* lisp/org-capture.el (org-capture-place-entry): If the first
line is already a headline, just stay there.

Patch by THomas Fuchs.
TINYCHANGE

> I'm trying to capture and file an entry as an top-level entry as first entry

> in an org file without config at the beginning (no "#+").
> This leads to filing the entry as _second_ headline in the org file.

> The template is:
> ("z" "test" entry (file "~/Data/z.org") "* %^{Note} %t  :NOTE:\n %?"
> :prepend t)
>
> I think this is due to jumping over lines starting with "#+" at the
> beginning of the org file
> (line 715 in org-capture.el (org-capture-place-entry)).
> My file has no config header and starts with the first headline. Calling
> outline-next-heading
> in this situation leads to jumping to the second headline in the file.

lisp/org-capture.el

@@ -712,7 +712,8 @@ already gone."
       (setq level 1)
       (if reversed
 	  (progn (goto-char (point-min))
-		 (outline-next-heading))
+		 (or (org-at-heading-p)
+		     (outline-next-heading)))
 	(goto-char (point-max))
 	(or (bolp) (insert "\n"))))
      (t