report_custom_filename : filename is not mandatory

report_custom_filename/controllers/reports.py

@@ -37,7 +37,7 @@ class Reports(main.Reports):
             [('report_name', '=', action['report_name'])],
             0, False, False, context)
         for report in report_xml.read(report_ids, fields=['download_filename']):
-            if not report['download_filename']:
+            if not report.get('download_filename'):
                 continue
             objects = req.session.model(context['active_model'])\
                 .browse(context['active_ids'])