POT file generation failing for GParted User Guide

[Curtis Gedak <gedakc gmail com>]

Recently the gnome.org automatic generation of the POT file for the 
GParted User Guide has been failing.  The last successfully generated 
POT file appears to have been on 2014-01-10 17:19+0000. See:
https://l10n.gnome.org/module/gparted/

Can someone point me to who I should contact, or what I might need to 
fix to address this issue?

Regards,
Curtis Gedak
Maintainer of GParted

NOTE:  the error message is as follows:

Error regenerating POT file for document gparted-help:

cd "<scratchdir>/git/gparted/help" && xml2po -o 
<scratchdir>/git/gparted/help/C/gparted-help.pot -e
Traceback (most recent call last):
  File "/usr/bin/xml2po", line 191, in
    main(sys.argv[1:])
  File "/usr/bin/xml2po", line 184, in main
    xml2po_main.to_pot(filenames)
  File "/usr/lib/python2.7/dist-packages/xml2po/__init__.py", line 585, 
in to_pot
    self.output_po()
  File "/usr/lib/python2.7/dist-packages/xml2po/__init__.py", line 676, 
in output_po
    self.msg.outputMessage(tcmsg, lineno=0, comment=tccom)
  File "/usr/lib/python2.7/dist-packages/xml2po/__init__.py", line 92, 
in outputMessage
    self.linenos[t] = [ (self.filename, tag, lineno) ]
AttributeError: MessageOutput instance has no attribute 'filename'

Can't generate POT file, using old one.