[DCCP] options: Fix handling of ackvecs in DATA packets

I.e. they should be just ignored, but we have to use 'break', not 'continue',
as we have to possibly reset the mandatory flag.
Signed-off-by: NArnaldo Carvalho de Melo <acme@mandriva.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

net/dccp/options.c

@@ -148,7 +148,7 @@ int dccp_parse_options(struct sock *sk, struct sk_buff *skb)
 		case DCCPO_ACK_VECTOR_0:
 		case DCCPO_ACK_VECTOR_1:
 			if (pkt_type == DCCP_PKT_DATA)
-				continue;
+				break;
 
 			if (dp->dccps_options.dccpo_send_ack_vector &&
 			    dccp_ackvec_parse(sk, skb, opt, value, len))