[SCTP]: Fix build warning in sctp_sf_do_5_1C_ack().

Reported by Andrew Morton.

net/sctp/sm_statefuns.c: In function 'sctp_sf_do_5_1C_ack':
net/sctp/sm_statefuns.c:484: warning: 'error' may be used uninitialized in this function
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

net/sctp/sm_statefuns.c

@@ -481,7 +481,7 @@ sctp_disposition_t sctp_sf_do_5_1C_ack(const struct sctp_endpoint *ep,
 	sctp_init_chunk_t *initchunk;
 	struct sctp_chunk *err_chunk;
 	struct sctp_packet *packet;
-	sctp_error_t error;
+	sctp_error_t error = SCTP_ERROR_NO_ERROR;
 
 	if (!sctp_vtag_verify(chunk, asoc))
 		return sctp_sf_pdiscard(ep, asoc, type, arg, commands);