Construct the server side early_data extension

Reviewed-by: Rich Salz <rsalz@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/2737)
diff --git a/ssl/statem/statem_clnt.c b/ssl/statem/statem_clnt.c
index e70ed10..4f44093 100644
--- a/ssl/statem/statem_clnt.c
+++ b/ssl/statem/statem_clnt.c
@@ -714,7 +714,7 @@
              */
             if (!tls13_change_cipher_state(s,
                         SSL3_CC_EARLY | SSL3_CHANGE_CIPHER_CLIENT_WRITE))
-            return WORK_ERROR;
+                return WORK_ERROR;
         }
         break;