org-export: Fix menu leak when reloading Org
commit956858a39562c2272807704ef128258804ce45a0
authorNicolas Goaziou <n.goaziou@gmail.com>
Sat, 6 Oct 2012 19:51:51 +0000 (6 21:51 +0200)
committerNicolas Goaziou <n.goaziou@gmail.com>
Sat, 6 Oct 2012 20:04:27 +0000 (6 22:04 +0200)
treeebf36c01c2e3c3fbda4e953db940182577cb5355
parent36306bae4e48b711edb2e05da87a50ebc5c41a1d
org-export: Fix menu leak when reloading Org

* contrib/lisp/org-export.el (org-export-define-backend,
  org-export-define-derived-backend): Make sure a given entry won't be
  added to menu more than once.
contrib/lisp/org-export.el