Fix an issue with CI_Upload max filesize

Reported via the forums: http://forum.codeigniter.com/thread-62510.html
diff --git a/system/libraries/Upload.php b/system/libraries/Upload.php
index 51232f8..20ddfc1 100644
--- a/system/libraries/Upload.php
+++ b/system/libraries/Upload.php
@@ -695,6 +695,22 @@
 	// --------------------------------------------------------------------
 
 	/**
+	 * Set Maximum File Size
+	 *
+	 * An internal alias to set_max_filesize() to help with configuration
+	 * as initialize() will look for a set_<property_name>() method ...
+	 *
+	 * @param	int	$n
+	 * @return	CI_Upload
+	 */
+	protected function set_max_size($n)
+	{
+		return $this->set_max_filesize($n);
+	}
+
+	// --------------------------------------------------------------------
+
+	/**
 	 * Set Maximum File Name Length
 	 *
 	 * @param	int	$n