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

Change-Id: Iaf0fd93af8567520229a0a73fda8bd5fcc8091f1