Update setOptions() signature

- Allow passing either array or Traversable object

src/AbstractAdapter.php

@@ -132,11 +132,15 @@ public function setOption($key, $value)
     /**
      * Set object state from options array
      *
-     * @param  array $options
+     * @param  array|Traversable $options
      * @return Zend_Form_Element
      */
-    public function setOptions(array $options = null)
+    public function setOptions($options = array())
     {
+        if (!is_array($options) && !$options instanceof Traversable) {
+            throw new Exception\InvalidArgumentException(__METHOD__ . ' expects an array or Traversable');
+        }
+
         foreach ($options as $key => $value) {
             $this->setOption($key, $value);
         }

src/Exception/InvalidArgumentException.php

@@ -0,0 +1,38 @@
+<?php
+/**
+ * Zend Framework
+ *
+ * LICENSE
+ *
+ * This source file is subject to the new BSD license that is bundled
+ * with this package in the file LICENSE.txt.
+ * It is also available through the world-wide-web at this URL:
+ * http://framework.zend.com/license/new-bsd
+ * If you did not receive a copy of the license and are unable to
+ * obtain it through the world-wide-web, please send an email
+ * to license@zend.com so we can send you a copy immediately.
+ *
+ * @category   Zend
+ * @package    Zend_Captcha
+ * @copyright  Copyright (c) 2005-2011 Zend Technologies USA Inc. (http://www.zend.com)
+ * @license    http://framework.zend.com/license/new-bsd     New BSD License
+ */
+
+/**
+ * @namespace
+ */
+namespace Zend\Captcha\Exception;
+
+use Zend\Captcha\Exception;
+
+/**
+ * @category   Zend
+ * @package    Zend_Captcha
+ * @copyright  Copyright (c) 2005-2011 Zend Technologies USA Inc. (http://www.zend.com)
+ * @license    http://framework.zend.com/license/new-bsd     New BSD License
+ */
+class InvalidArgumentException
+    extends \InvalidArgumentException
+    implements Exception
+{
+}