can: test size of struct sockaddr in sendmsg
This patch makes the CAN socket code conform to the manpage of sendmsg. Signed-off-by: NKurt Van Dijck <kurt.van.dijck@eia.be> Acked-by: NOliver Hartkopp <socketcan@hartkopp.net> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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