added check for logged in user in filter email

plugins/fipfcard_plugin/php/filter_mail.php

@@ -34,9 +34,10 @@ add_filter('df_notification_body', 'filter_email_fb_CIPF', 10, 2); // the admini
 * callback to provide the user info corresponding to the $$key_word$$
 */
 function replace_words_CIPF($matches) {
+error_log("in replace_words_CIPF");
+	if (!is_user_logged_in())
+		return "";
 	$current_user = wp_get_current_user();
-	if ($current_user->ID === 0)
-		return "[no user logged in]";
 	$query = $matches[1];
 	$result = $current_user->$query;
 	return $result;