const syscall.SizeofRtMsghdr

2 uses

	syscall (current package)
		route_darwin.go#L13: 		return &RouteMessage{Header: p.Header, Data: b[SizeofRtMsghdr:any.Msglen]}
		ztypes_darwin_arm64.go#L305: 	SizeofRtMsghdr    = 0x5c