0028165: Receipts are not synchronized under some cirmcunstances

diff --git a/src/org/openbravo/retail/posterminal/OrderLoader.java b/src/org/openbravo/retail/posterminal/OrderLoader.java
--- a/src/org/openbravo/retail/posterminal/OrderLoader.java
+++ b/src/org/openbravo/retail/posterminal/OrderLoader.java
@@ -1386,7 +1386,7 @@
       }
 
       FIN_PaymentSchedule paymentScheduleInvoice = null;
-      if (invoice != null) {
+      if (invoice != null && invoice.getGrandTotalAmount().compareTo(BigDecimal.ZERO) != 0) {
         paymentScheduleInvoice = OBProvider.getInstance().get(FIN_PaymentSchedule.class);
         paymentScheduleInvoice.setCurrency(order.getCurrency());
         paymentScheduleInvoice.setInvoice(invoice);
@@ -1428,6 +1428,10 @@
         if (payment.has("isPrePayment") && payment.getBoolean("isPrePayment")) {
           continue;
         }
+        BigDecimal paid = BigDecimal.valueOf(payment.getDouble("paid"));
+        if (paid.compareTo(BigDecimal.ZERO) == 0){
+          continue;
+        }
         String paymentTypeName = payment.getString("kind");
         for (OBPOSAppPayment type : posTerminal.getOBPOSAppPaymentList()) {
           if (type.getSearchKey().equals(paymentTypeName)) {