[fix] [minor] stock_entry.py error for None qty
diff --git a/erpnext/stock/doctype/stock_entry/stock_entry.py b/erpnext/stock/doctype/stock_entry/stock_entry.py
index 6a949d3..18d600d 100644
--- a/erpnext/stock/doctype/stock_entry/stock_entry.py
+++ b/erpnext/stock/doctype/stock_entry/stock_entry.py
@@ -102,7 +102,7 @@
 			if self.difference_account and not item.expense_account:
 				item.expense_account = self.difference_account
 
-			if not item.transfer_qty:
+			if not item.transfer_qty and item.qty:
 				item.transfer_qty = item.qty * item.conversion_factor
 
 			if (self.purpose in ("Material Transfer", "Material Transfer for Manufacture")