Fix upgrader

include/class.upgrader.php

@@ -36,7 +36,7 @@ class Upgrader extends SetupWizard {
             set_time_limit(0);
 
         //Init persistent state of upgrade.
-        $this->state = &$_SESSION['ost_upgrader'][$this->getShash()]['state'];
+        $this->state = &$_SESSION['ost_upgrader']['state'];
 
         //Init the task Manager.
         if(!isset($_SESSION['ost_upgrader'][$this->getShash()]))

scp/upgrade.php

@@ -29,7 +29,6 @@ if($_POST && $_POST['s'] && !$upgrader->isAborted()) {
                 $errors['err']='The upgrader does NOT support upgrading from the current vesion!';
             elseif($upgrader->check_prereq()) {
                 $upgrader->setState('upgrade');
-                $_SESSION['ost_upgrader'] = null;
             } else
                 $errors['prereq']='Minimum requirements not met!';
             break;