Fix RET in orgtbl-mode, when cursor is at the beginning of the buffer.

RET did fail in orgtbl-mode, if the cursor was at the beginning of the
buffer.  Now it opens a new line whenever the cursor is at the
beginning of a line, and that includes the beginning of the buffer.....

lisp/ChangeLog

@@ -1,5 +1,7 @@
 2008-11-24  Carsten Dominik  <carsten.dominik@gmail.com>
 
+	* org-table.el (orgtbl-ret): Fix RET at beginning-of-buffer.
+
 	* org-publish.el (org-publish-org-index): Improve removal of
 	temporary buffers.
 

lisp/org-table.el

@@ -3461,8 +3461,10 @@ With prefix arg, also recompute table."
 (defun orgtbl-ret ()
   "Justification and field motion for `orgtbl-mode'."
   (interactive)
-  (org-table-justify-field-maybe)
-  (org-table-next-row))
+  (if (bobp)
+      (newline)
+    (org-table-justify-field-maybe)
+    (org-table-next-row)))
 
 (defun orgtbl-self-insert-command (N)
   "Like `self-insert-command', use overwrite-mode for whitespace in tables.