[fix] [minor] manitenance schedules report
diff --git a/support/report/maintenance_schedules/maintenance_schedules.txt b/support/report/maintenance_schedules/maintenance_schedules.txt
index 525f483..766eb20 100644
--- a/support/report/maintenance_schedules/maintenance_schedules.txt
+++ b/support/report/maintenance_schedules/maintenance_schedules.txt
@@ -2,7 +2,7 @@
  {
   "creation": "2013-05-06 14:25:21", 
   "docstatus": 0, 
-  "modified": "2013-05-06 14:32:47", 
+  "modified": "2013-10-09 12:23:27", 
   "modified_by": "Administrator", 
   "owner": "Administrator"
  }, 
@@ -10,7 +10,7 @@
   "doctype": "Report", 
   "is_standard": "Yes", 
   "name": "__common__", 
-  "query": "SELECT\n    ms_item.scheduled_date as \"Schedule Date:Date:120\",\n\tms_item.item_code as \"Item Code:Link/Item:120\",\n\tms_item.item_name as \"Item Name::120\",\n\tms_item.serial_no as \"Serial No::120\",\n\tms_item.incharge_name as \"Incharge::120\",\n\tms.customer_name as \"Customer:Link/Customer:120\",\n\tms.address_display as \"Customer Address::120\",\n\tms.sales_order_no as \"Sales Order:Link/Sales Order:120\",\n\tms.company as \"Company:Link/Company:120\"\n\t\nFROM\n\t`tabMaintenance Schedule` ms, `tabMaintenance Schedule Detail` ms_item\nWHERE\n\tms.name = ms_item.parent and ms.docstatus = 1\nORDER BY\n\tms_item.scheduled_date asc, ms_item.item_code asc", 
+  "query": "SELECT\n    ms_sch.scheduled_date as \"Schedule Date:Date:120\",\n\tms_sch.item_code as \"Item Code:Link/Item:120\",\n\tms_sch.item_name as \"Item Name::120\",\n\tms_sch.serial_no as \"Serial No::120\",\n\tms_sch.incharge_name as \"Incharge::120\",\n\tms.customer_name as \"Customer:Link/Customer:120\",\n\tms.address_display as \"Customer Address::120\",\n\tms_item.prevdoc_docname as \"Sales Order:Link/Sales Order:120\",\n\tms.company as \"Company:Link/Company:120\"\n\t\nFROM\n\t`tabMaintenance Schedule` ms, \n    `tabMaintenance Schedule Detail` ms_sch, \n    `tabMaintenance Schedule Item` ms_item\nWHERE\n\tms.name = ms_sch.parent and ms.name = ms_item.parent and ms.docstatus = 1\nORDER BY\n\tms_sch.scheduled_date asc, ms_sch.item_code asc", 
   "ref_doctype": "Maintenance Schedule", 
   "report_name": "Maintenance Schedules", 
   "report_type": "Query Report"