add AERA chart type

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@24636 20353a03-c40f-0410-a6d1-a30d3c3de9de

product/ERP5Form/OOoChart.py

@@ -116,6 +116,7 @@ class OOoChartWidget(Widget.Widget):
                                     ('circle', 'chart:circle'),
                                     ('line', 'chart:line'),
                                     ('scatter', 'chart:scatter'),
+                                    ('area', 'chart:area'),
                                     ],
                               size=0)
   property_names.append('chart_type')