Clear out f_err pattern from handshake_client.c.

This leaves just handshake_server.c.

BUG=128

Change-Id: I92503404eca0765539c95f107a726fb84c28e8bd
Reviewed-on: https://boringssl-review.googlesource.com/17247
Commit-Queue: Steven Valdez <svaldez@google.com>
Reviewed-by: Steven Valdez <svaldez@google.com>
CQ-Verified: CQ bot account: commit-bot@chromium.org <commit-bot@chromium.org>
diff --git a/ssl/tls13_both.c b/ssl/tls13_both.c
index 7a375fe..32f937b 100644
--- a/ssl/tls13_both.c
+++ b/ssl/tls13_both.c
@@ -384,9 +384,9 @@
     goto err;
   }
 
-  int al;
-  if (!tls12_check_peer_sigalg(ssl, &al, signature_algorithm)) {
-    ssl3_send_alert(ssl, SSL3_AL_FATAL, al);
+  uint8_t alert = SSL_AD_DECODE_ERROR;
+  if (!tls12_check_peer_sigalg(ssl, &alert, signature_algorithm)) {
+    ssl3_send_alert(ssl, SSL3_AL_FATAL, alert);
     goto err;
   }
   hs->new_session->peer_signature_algorithm = signature_algorithm;