Merge "libgui: check for invalid slot in attachBuffer" into lmp-dev am: af33c978c8 am: 396cc342a7 am: 91a7e47a53 am: 6a9b41dc22 am: 1f8b90126a
am: 0544fa4580

Change-Id: Id6d055a523eed1f96e1373d4f3fede43551a8abe