Create sample Material Requests via setup wizard only if warehouse exists

erpnext/setup/setup_wizard/sample_data.py

@@ -15,6 +15,7 @@ def make_sample_data():
 	selling_items = frappe.get_all("Item", filters = {"is_sales_item": 1})
 	buying_items = frappe.get_all("Item", filters = {"is_purchase_item": 1})
 	customers = frappe.get_all("Customer")
+	warehouses = frappe.get_all("Warehouse")
 
 	if selling_items and customers:
 		for i in range(3):
@@ -24,7 +25,7 @@ def make_sample_data():
 
 	make_projects()
 
-	if buying_items:
+	if buying_items and warehouses:
 		make_material_request(buying_items)
 
 	frappe.db.commit()