Fixed a rounding error bug in the Ogone payment plugin.

docs/changelog/7.x.x.txt

@@ -10,6 +10,9 @@
   - fixed per-field prices in ThingyRecord
   - fixed a bug where VersionTag->get would return an unsafe copy of its
     state ( Martin Kamerbeek / Oqapi )
+  - fixed a bug in the Ogone pay driver where for certain combinations of tax
+    rates and in store credit a rounding error would prevent checkout at
+    Ogone. ( Martin Kamerbeek / Oqapi )
 
 7.7.14
  - fixed #10606: shelf selector

lib/WebGUI/Shop/PayDriver/Ogone.pm

@@ -188,7 +188,7 @@ sub ogoneCheckoutButton {
 	$self->{ _ogoneTransaction } = "done" ;
     
     # Ogone needs the transaction amount in cents
-	my $amount  = $transaction->get('amount') * 100;
+    my $amount  = sprintf( "%.2f", $transaction->get('amount') ) * 100;
     $amount     =~ s/[^\d]//g;              # Remove any character from amount except digits.
 
     my $orderId     = $transaction->getId;