get_members_capital_at_date : instead of None, which is not iterable, return dic…

get_members_capital_at_date : instead of None, which is not iterable, return dic with key error in case of failure

outils/lib/compta.py

@@ -314,4 +314,4 @@ def get_members_capital_at_date(date,only_active):
         return OdooAPI().execute("lacagette.exports", 'get_members_capital_at_date', {'date': date, 'only_active': only_active})
     except Exception as e:
         coop_logger.error("Erreur get_members_capital_at_date : %s", str(e))
-        return None
+        return {'error': "Erreur get_members_capital_at_date : " + str(e)}
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