magento fatal - call to member getquote in checkout page
<p>proceed to checkout button displaying 2 times in cart page</p>

<pre><code>Fatal error: Call to a member function getQuote() on a non-object in /home/apd16/public_html/app/code/core/Mage/Checkout/controllers/OnepageController.php on line 195
</code></pre>

<p>I have no idea why its happened suddenly</p>