修改bug：

私有应收-跟单	回款差额有的显示，有的不显示

tenant/organization/src/main/resources/mapper/ReceivableMapper.xml

@@ -731,8 +731,8 @@
         GROUP_CONCAT(DISTINCT ipii.invoice_party SEPARATOR ',') AS invoice_party,
         GROUP_CONCAT(DISTINCT ipii.tax_point SEPARATOR ',') AS tax_point,
         GROUP_CONCAT(DISTINCT ipiis.settlement_payment_reason SEPARATOR ',') AS settlement_payment_reason,
-        MAX(ipiis.settlement_payment_difference) AS settlement_payment_difference,
-        MAX(ipiis.actual_received_amount) AS actual_received_amount,
+        MAX(COALESCE(ipiis.settlement_payment_difference, 0)) AS settlement_payment_difference,
+        MAX(COALESCE(ipiis.actual_received_amount, 0)) AS actual_received_amount,
         MAX(ipiis.receive_payment_date) AS receive_payment_date,
         MAX(ipiis.create_by) AS create_by,
         MAX(ipiis.create_time) AS create_time