#362423 by chx: Include session.inc during installer to avoid fatal errors if...

#362423 by chx: Include session.inc during installer to avoid fatal errors if things don't go exactly according to plan.

install.php

@@ -50,6 +50,7 @@ function install_main() {
 
   // Load module basics (needed for hook invokes).
   include_once DRUPAL_ROOT . '/includes/module.inc';
+  include_once DRUPAL_ROOT . '/includes/session.inc';
   $module_list['system']['filename'] = 'modules/system/system.module';
   $module_list['filter']['filename'] = 'modules/filter/filter.module';
   module_list(TRUE, FALSE, $module_list);