[Fix] patch fixes for V11 migration

erpnext/buying/doctype/purchase_order/purchase_order.json

@@ -3732,7 +3732,7 @@
  "issingle": 0, 
  "istable": 0, 
  "max_attachments": 0, 
- "modified": "2018-08-01 15:18:33.155409", 
+ "modified": "2018-08-27 08:35:10.345286",
  "modified_by": "Administrator", 
  "module": "Buying", 
  "name": "Purchase Order", 

erpnext/patches.txt

@@ -520,6 +520,7 @@ erpnext.patches.v11_0.set_default_email_template_in_hr #08-06-2018
 erpnext.patches.v11_0.uom_conversion_data #30-06-2018
 erpnext.patches.v10_0.taxes_issue_with_pos
 erpnext.patches.v11_0.update_account_type_in_party_type
+erpnext.patches.v11_0.rename_supplier_type_to_supplier_group
 erpnext.patches.v10_1.transfer_subscription_to_auto_repeat
 erpnext.patches.v11_0.update_brand_in_item_price
 erpnext.patches.v11_0.create_default_success_action
@@ -530,7 +531,6 @@ erpnext.patches.v11_0.rename_field_max_days_allowed
 erpnext.patches.v11_0.create_salary_structure_assignments
 erpnext.patches.v11_0.rename_health_insurance
 erpnext.patches.v11_0.rebuild_tree_for_company
-erpnext.patches.v11_0.rename_supplier_type_to_supplier_group
 erpnext.patches.v11_0.create_department_records_for_each_company
 erpnext.patches.v11_0.make_location_from_warehouse
 erpnext.patches.v11_0.make_asset_finance_book_against_old_entries

erpnext/patches/v11_0/update_total_qty_field.py

@@ -31,5 +31,5 @@ def execute():
 		if when_then:
 			frappe.db.sql('''
 				UPDATE
-					`tab%s` dt SET dt.total_qty = CASE %s END
+					`tab%s` dt SET dt.total_qty = CASE %s ELSE 0.0 END
 			''' % (doctype, " ".join(when_then)))