test/evp_extra_test.c: Peek at the error instead of getting it.

If there is an error report, we want to get it printed too.

Reviewed-by: Matt Caswell <matt@openssl.org>
Reviewed-by: Tomas Mraz <tomas@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/15604)

test/evp_extra_test.c

@@ -1294,7 +1294,7 @@ static int test_EVP_PKCS82PKEY_wrong_tag(void)
         || !TEST_int_gt(BIO_get_mem_data(membio, &membuf), 0)
         || !TEST_ptr(p8inf = d2i_PKCS8_PRIV_KEY_INFO_bio(membio, NULL))
         || !TEST_ptr(pkey2 = EVP_PKCS82PKEY(p8inf))
-        || !TEST_int_eq(ERR_get_error(), 0)) {
+        || !TEST_int_eq(ERR_peek_last_error(), 0)) {
         goto done;
     }