busybox

udhcpd: remove redundant code in send_offer()

static_lease_nip and lease pointer are canculated in the caller,
no need to calculate them again. lease_time_sec calculation
is also redundant: it is assigned to later, w/o being used
in between.

function                                             old     new   delta
udhcpd_main                                         1956    1925     -31

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>