Updated connection not set as null after closing in mailingListIC.java

Task/Mailing List/Java component/mailingListIC.java

@@ -366,6 +366,7 @@ public class MailingListIC extends ValidatorEJB {
 	        if (conn != null) {
 	            try {
 	                conn.close();
+	                conn =null;
 	            } catch (SQLException e) {
 	                e.printStackTrace();
 	            }