Fix potential overflow when multiplying integers in transform_vector().
This issue is causing the absolute coordinate of the bottom right corner
of the box to be incorrectly calculated for draw_rounded_box(), which is
used in menu UI to clear the previous screen.
In addition, check the lower bound in within_box().
BRANCH=none
BUG=b:146399181, b:159772149
TEST=emerge-puff libpayload
TEST=Previous screen is cleared properly for menu UI
Change-Id: I57845f54e18e5bdbd0d774209ee9632cb860b0c2
Signed-off-by: Yu-Ping Wu <yupingso@chromium.org>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/42770
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Shelley Chen <shchen@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
373ae2e734