Fix up a few places in the state machine that got missed with SSLfatal()

Reviewed-by: Richard Levitte <levitte@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/4778)
diff --git a/ssl/statem/extensions_srvr.c b/ssl/statem/extensions_srvr.c
index 7adb555..ca1cef5 100644
--- a/ssl/statem/extensions_srvr.c
+++ b/ssl/statem/extensions_srvr.c
@@ -858,8 +858,7 @@
                                  (const unsigned char *)s->init_buf->data,
                                  binderoffset, PACKET_data(&binder), NULL,
                                  sess, 0, ext) != 1) {
-        SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PARSE_CTOS_PSK,
-                 SSL_R_BAD_EXTENSION);
+        /* SSLfatal() already called */
         goto err;
     }