Fix va_arg all in test_error_c90

Reviewed-by: NAndy Polyakov <appro@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/3506)

test/testutil/tests.c

@@ -524,7 +524,7 @@ void test_error_c90(const char *desc, ...)
     va_list ap;
 
     va_start(ap, desc);
-    test_fail_message(NULL, NULL, -1, NULL, NULL, NULL, NULL, desc, ap);
+    test_fail_message_va(NULL, NULL, -1, NULL, NULL, NULL, NULL, desc, ap);
     va_end(ap);
 }