fix test

Author: devnexen

ext/intl/tests/gh17469.phpt

@@ -1,5 +1,9 @@
 --TEST--
 GH-17469: UConverter::transcode() raises always E_WARNING regardless of INI settings
+--SKIPIF--
+<?php
+if (PHP_OS_FAMILY === "Windows") die("skip currently unsupported on Windows");
+?>
 --FILE--
 <?php
 ini_set("intl.error_level", E_WARNING);