Walter, it appears that your alertness probably saved your life! If it was thought that you were working to escape via your window, why wasn't it checked for two days? Unless of course they were waiting for you to make that bid and to react accordingly....
No doubt you have since pondered the reliability of the whispered information about the window in the first place and the convenient transfer to the room that followed. Such are the muddied waters of war, when often the only thing to rely on is your own common sense.