Avoid crash on deleted windows.
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@ -411,7 +411,7 @@ void X11DRV_WND_SetGravity( WND* wnd, int value )
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{
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X11DRV_WND_DATA *data = wnd->pDriverData;
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if (data->window && data->bit_gravity != value )
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if (data && data->window && data->bit_gravity != value )
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{
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XSetWindowAttributes win_attr;
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win_attr.bit_gravity = value;
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