sctp: remove a redundant NULL check

It confuses Smatch when we check "sinit" for NULL and then non-NULL and
that causes a false positive warning later.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Acked-by: Neil Horman <nhorman@tuxdriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/sctp/socket.c b/net/sctp/socket.c
index 7cc62b9..6b20a15 100644
--- a/net/sctp/socket.c
+++ b/net/sctp/socket.c
@@ -1743,7 +1743,7 @@
 		 * either the default or the user specified stream counts.
 		 */
 		if (sinfo) {
-			if (!sinit || (sinit && !sinit->sinit_num_ostreams)) {
+			if (!sinit || !sinit->sinit_num_ostreams) {
 				/* Check against the defaults. */
 				if (sinfo->sinfo_stream >=
 				    sp->initmsg.sinit_num_ostreams) {