sctp: sctp_sendmsg: Don't test known non-null sinfo

It's already known non-null above.
Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/sctp/socket.c

@@ -1791,12 +1791,10 @@ SCTP_STATIC int sctp_sendmsg(struct kiocb *iocb, struct sock *sk,
 		goto out_free;
 	}
 
-	if (sinfo) {
-		/* Check for invalid stream. */
-		if (sinfo->sinfo_stream >= asoc->c.sinit_num_ostreams) {
-			err = -EINVAL;
-			goto out_free;
-		}
+	/* Check for invalid stream. */
+	if (sinfo->sinfo_stream >= asoc->c.sinit_num_ostreams) {
+		err = -EINVAL;
+		goto out_free;
 	}
 
 	timeo = sock_sndtimeo(sk, msg->msg_flags & MSG_DONTWAIT);