Fix inventory worksheet generator, per butterball

tailbone/templates/reports/inventory.mako

@@ -1,4 +1,4 @@
-## -*- coding: utf-8 -*-
+## -*- coding: utf-8; -*-
 <%inherit file="/page.mako" />
 
 <%def name="title()">Inventory Worksheet</%def>
@@ -29,7 +29,8 @@
   </b-field>
 
   <b-field>
-    <b-checkbox name="exclude-not-for-sale" :value="true"
+    <b-checkbox name="exclude-not-for-sale"
+                v-model="excludeNotForSale"
                 native-value="1">
       Exclude items marked "not for sale".
     </b-checkbox>
@@ -52,6 +53,7 @@
   <script type="text/javascript">
 
     ThisPageData.departments = ${json.dumps([{'uuid': d.uuid, 'name': d.name} for d in departments])|n}
+    ThisPageData.excludeNotForSale = true
 
   </script>
 </%def>