Correct code style

Signed-off-by: Ben Taylor <ben.taylor@linaro.org>
diff --git a/library/ssl_tls12_server.c b/library/ssl_tls12_server.c
index 055e75a..e178550 100644
--- a/library/ssl_tls12_server.c
+++ b/library/ssl_tls12_server.c
@@ -2198,7 +2198,7 @@
         {
             ssl->session_negotiate->id_len = n = 32;
             if ((ret = psa_generate_random(ssl->session_negotiate->id,
-                                        n)) != 0) {
+                                           n)) != 0) {
                 return ret;
             }
         }