As reported by Coverity, xsmp_rx_xve_modify() currently passes a partially initialised struct ib_address_vector to xve_update_tca() and thence to eoib_set_gateway(), which uses memcpy() to store the whole structure including the (unused and unneeded) uninitialised fields. Silence the Coverity warning by zeroing the whole structure. Signed-off-by: Michael Brown <mcb30@ipxe.org>