Add a judgment on the child's parent when show child

[iysheng]

I found a bug when there are two dialogs. dialog A has wnd tree such as:

{ &s_dialog_enter_button,>--ID_DIALOG_ENTER6666_BUTTON,>"",>926, 30, 66, 66},
{ &gs_lamp_mode_buttons[LAMP_MODE_OFF_WORK],>---ID_BUTTON_LAMP_OFF_WORK,>---"",>655, 525, 350, 75},
{NULL, 0 , 0, 0, 0, 0, 0}

and another dialog B has wnd tree such as:

{ &s_dialog_enter_button,>--ID_DIALOG_ENTER6666_BUTTON,>"",>926, 30, 66, 66},
{NULL, 0 , 0, 0, 0, 0, 0}

When I show dialog B, I can find a button with ID==ID_BUTTON_LAMP_OFF_WORK, after I check my code, I found there may has a BUG, so I do this Add a judgment on the child's parent when show child ,