problem with po-mode+

problem with po-mode+

[F.Gr.]

Hi,

I'm running Emacs from bzr repository (the latest build is 110516)
and using 'po-mode+' (http://www.emacswiki.org/emacs/po-mode+.el).
When I open a '.po' file, I get the following:

``Debugger entered--Lisp error: (void-variable po-start-of-msgstr)
  po-compute-counters(nil)
  po-mode()
  set-auto-mode-0(po-mode nil)
  set-auto-mode()
  normal-mode(t)
  after-find-file(nil t)
  find-file-noselect-1(#<buffer xfce4-mixer.master.it.po> "~/lib/im/translation/xfce4-mixer.master.it.po" nil nil "~/lib/im/translation/xfce4-mixer.master.it.po" (393355 2051))
  find-file-noselect("/home/fgr/lib/im/translation/xfce4-mixer.master.it.po" nil nil nil)
  find-file("/home/fgr/lib/im/translation/xfce4-mixer.master.it.po")
  command-line-1(("/home/fgr/lib/im/translation/xfce4-mixer.master.it.po"))
  command-line()
  normal-top-level()''

I know nothing about Lisp language.