[Unity Editor] MissingScript导致Go

代码参考： Unity3D编辑器：删掉MissingScirpt脚本
问题环境：

• Unity 5.4.6f3 (64-bit)

  
  问题现象

  昨天改了点东西，发现某个Prefab拖到Hierarchy后状态不对（见上图）。和朋友聊过后发现Prefab上使用着一个已经删掉的脚本。

[MenuItem("GameObject/DMTools/移除MissingScripts")]
static void RemoveMissingScripts()
{
    if (null != Selection.activeTransform)
    {
        _RemoveMissScripts(Selection.activeTransform);
    }

    PrefabUtility.ReconnectToLastPrefab(Selection.activeGameObject);
}

private static void _RemoveMissScripts(Transform trans)
{
    Component[] cmps = trans.GetComponents<Component>();
    SerializedObject serializedObject = new SerializedObject(trans.gameObject);
    SerializedProperty prop = serializedObject.FindProperty("m_Component");
    for (int i = cmps.Length-1; i >=0 ; --i)
    {
        if (null == cmps[i])
        {
            prop.DeleteArrayElementAtIndex(i);
        }
    }
    serializedObject.ApplyModifiedProperties();

    foreach (Transform child in trans)
    {
        _RemoveMissScripts(child);
    }
}