File fix_wrong_default_max_length.patch of Package nconf

diff --git a/modify_attr_write2db.php b/modify_attr_write2db.php
index 5e3c162..7b739f6 100644
--- a/modify_attr_write2db.php
+++ b/modify_attr_write2db.php
@@ -147,7 +147,7 @@ if (isset($_POST['predef_value'])) {
 if (isset($_POST['max_length'])) {
     $max_length = $_POST['max_length'];
 } else {
-    $max_length = "";
+    $max_length = "0";
 }
 
 if ($_POST['ordering'] != "") {