`ucv_array_set` releases the array's reference to the object being cleared.
If this is the last reference to the object, it will be freed, making our
pointer `val` invalid.
To avoid this, we need to obtain our own reference to the object so we
can safely return `val`.
Signed-off-by: Matthew Cather <mattbob4@gmail.com>
(cherry picked from commit 6a10da2934)