[FIX] report_csv: make it working if docids is False

len() is used on docids, but in some cases, docids is False
wich raised a TypeError

report_csv/models/ir_report.py

@@ -55,7 +55,7 @@ def _render_csv(self, report_ref, docids, data):
         report_sudo = self._get_report(report_ref)
         report_model_name = "report.%s" % report_sudo.report_name
         report_model = self.env[report_model_name]
-        res_id = len(docids) == 1 and docids[0]
+        res_id = (len(docids) == 1 and docids[0]) if docids else False
         if not res_id or not report_sudo.attachment or not report_sudo.attachment_use:
             return report_model.with_context(
                 **{