xgettext not extracting strings in a Glade GtkListStore

[Kip Warner <kip thevertigo com>]

Hey list,

I'm not sure if this is a bug in xgettext or not, but I figured I'd run
it by this list before possibly posting on bug-gettext gnu org 

I have a sample GtkListStore declared within a Glade file containing a
single row with one column of type gchararray. Note that the string is
marked as translatable="yes". When I pass it through xgettext, it does
not appear to see the localizable string in the GtkListStore.

        $ cat minimal.glade 
        <?xml version="1.0" encoding="UTF-8"?>
        <interface>
          <!-- interface-requires gtk+ 3.0 -->
          <object class="GtkListStore" id="liststore1">
            <columns>
              <!-- column-name column_name -->
              <column type="gchararray"/>
            </columns>
            <data>
              <row>
                <col id="0" translatable="yes">stuff</col>
              </row>
            </data>
          </object>
          <object class="GtkWindow" id="window1">
            <property name="can_focus">False</property>
            <child>
              <object class="GtkComboBox" id="combobox1">
                <property name="visible">True</property>
                <property name="can_focus">False</property>
                <property name="model">liststore1</property>
              </object>
            </child>
          </object>
        </interface>

I am using xgettext as follows, without any foo.pot being generated
against the above minimal:

        $ xgettext --language Glade minimal.glade --output=foo.pot

-- 
Kip Warner -- Software Engineer
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http://www.thevertigo.com