Index: branches/version-2_12-dev/data/class/plugin/SC_Plugin_Util.php
===================================================================
--- branches/version-2_12-dev/data/class/plugin/SC_Plugin_Util.php	(revision 21724)
+++ branches/version-2_12-dev/data/class/plugin/SC_Plugin_Util.php	(revision 21728)
@@ -22,8 +22,6 @@
  */
 
-// 棒グラフ生成クラス
+// プラグインのユーティリティクラス.
 class SC_Plugin_Util {
-
-
 
     /**
Index: branches/version-2_12-dev/data/class/helper/SC_Helper_Plugin.php
===================================================================
--- branches/version-2_12-dev/data/class/helper/SC_Helper_Plugin.php	(revision 21681)
+++ branches/version-2_12-dev/data/class/helper/SC_Helper_Plugin.php	(revision 21728)
@@ -152,5 +152,5 @@
      * @return boolean 成功すればtrue
      */
-    function addAction($hook_point, $function, $priority) {
+    function addAction($hook_point, $function, $priority = 0) {
         if (!is_callable($function)) {
             // TODO エラー処理;　コール可能な形式ではありません