menu_get_choice() needs to handle the case that menu item
is empty. In this case, menu_get_choice() returns -ENOENT.
Signed-off-by: Masahisa Kojima <masahisa.kojima@linaro.org> Reviewed-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com> Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>