libceph: fix TAG_WAIT case

If we get a WAIT as a client something went wrong; error out.  And don't
fall through to an unrelated case.
Signed-off-by: Sage Weil <sage@newdream.net>

net/ceph/messenger.c

@@ -1355,7 +1355,9 @@ static int process_connect(struct ceph_connection *con)
 		 * to WAIT.  This shouldn't happen if we are the
 		 * client.
 		 */
-		pr_err("process_connect peer connecting WAIT\n");
+		pr_err("process_connect got WAIT as client\n");
+		con->error_msg = "protocol error, got WAIT as client";
+		return -1;
 
 	default:
 		pr_err("connect protocol error, will retry\n");