Minor cosmetic changes

main/inc/lib/document.lib.php

@@ -1314,7 +1314,7 @@ class DocumentManager {
      * @param string The course id
      * @return int The default certificate id
      */
-    function get_default_certificate_id($course_id) {
+    static function get_default_certificate_id($course_id) {
         $tbl_category   = Database :: get_main_table(TABLE_MAIN_GRADEBOOK_CATEGORY);
         $session_id     = api_get_session_id();
         if ($session_id==0 || is_null($session_id)) {

main/inc/lib/message.lib.php

@@ -275,7 +275,7 @@ class MessageManager
 				//message in outbox for user friend or group
 				$sql = "INSERT INTO $table_message (user_sender_id, user_receiver_id, msg_status, send_date, title, content, group_id, parent_id, update_date ) ".
 					   " VALUES ('$user_sender_id', '$receiver_user_id', '4', '".$now."','$clean_subject','$clean_content', '$group_id', '$parent_id', '".$now."')";
-				$rs = Database::query($sql);
+				Database::query($sql);
 				$outbox_last_id = Database::insert_id();
 
 				// save attachment file for outbox messages