Make empty return types in check_cvs the same for all code paths.
(From OE-Core rev: f86393c93dec47b24e837d0c4c5761a716ecdbb6)
Signed-off-by: Marta Rybczynska <marta.rybczynska@huawei.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>