fix(return): set default return warehouse

This captures the case of manual modifications to the return and ensures
that by default, the correct return warehouse will be set

(cherry picked from commit fa65291e98)

erpnext/controllers/sales_and_purchase_return.py

@@ -335,6 +335,9 @@ def make_return_doc(doctype: str, source_name: str, target_doc=None, return_agai
 			doc.select_print_heading = frappe.get_cached_value("Print Heading", _("Debit Note"))
 			if source.tax_withholding_category:
 				doc.set_onload("supplier_tds", source.tax_withholding_category)
+		elif doctype == "Delivery Note":
+			# manual additions to the return should hit the return warehous, too
+			doc.set_warehouse = default_warehouse_for_sales_return
 
 		for tax in doc.get("taxes") or []:
 			if tax.charge_type == "Actual":