- Forgot to make $inst global in function configure_pureftpd().

install/lib/installer_base.lib.php

@@ -1074,7 +1074,7 @@ class installer_base {
 
 
 	public function configure_pureftpd() {
-		global $conf;
+		global $conf, $inst;
 
 		$config_dir = $conf['pureftpd']['config_dir'];