From e5dbb5ea88e9b05ede00a70a1cbbaf849b5d5999 Mon Sep 17 00:00:00 2001
From: thepurpleblob <thepurpleblob>
Date: Tue, 24 Mar 2009 10:38:59 +0000
Subject: [PATCH] MDL-18542 Finally committing one line patch for bug. Sigh :-)

---
 mod/data/field/checkbox/field.class.php | 1 +
 1 file changed, 1 insertion(+)

diff --git a/mod/data/field/checkbox/field.class.php b/mod/data/field/checkbox/field.class.php
index 6c53fc6a9bb..b70bd4e6175 100755
--- a/mod/data/field/checkbox/field.class.php
+++ b/mod/data/field/checkbox/field.class.php
@@ -51,6 +51,7 @@ class data_field_checkbox extends data_field_base {
             if ($checkbox === '') {
                 continue; // skip empty lines
             }
+            $str .= '<input type="hidden" name="field_' . $this->field->id . '[]" value="" />';
             $str .= '<input type="checkbox" id="field_'.$this->field->id.'_'.$i.'" name="field_' . $this->field->id . '[]" ';
             $str .= 'value="' . s($checkbox) . '" ';