[bug] org-num doesn't insert numbering for all headlines when setting variable

[Rodrigo Morales]

Consider the following file.

#+HEADER: :tangle /tmp/a.org
#+BEGIN_SRC org
,* COMMENT a

paragraph

,* COMMENT b

paragraph

,* COMMENT c

paragraph
#+END_SRC

I started Emacs using the command shown below.

#+BEGIN_SRC sh
emacs -Q /tmp/a.org
#+END_SRC

I evaluated the following sexp using M-: (eval-expression) while being
in the buffer =a.org=.

#+BEGIN_SRC elisp
(progn
  (require 'org-num)
  (setq org-num-skip-commented t)
  (org-num-mode 1)
  (setq org-num-skip-commented nil))
#+END_SRC

I inserted an =a= character at the end of first line in the buffer.

* What happend?

The virtual numbering was shown for the first headline.

#+BEGIN_SRC org
,* 1 COMMENT aa

paragraph

,* COMMENT b

paragraph

,* COMMENT c

paragraph

#+END_SRC

* What should have happened?

The virtual numbering should have been shown for all headlines.

#+BEGIN_SRC org
,* 1 COMMENT aa

paragraph

,* 2 COMMENT b

paragraph

,* 3 COMMENT c

paragraph

#+END_SRC