Bug 27082: uncertainprice.pl does not handle pagination

To reproduce:
1- create a basket
2- add more of 20 orders with uncertain price
3- click on uncertain price button
4- on page 1 of list, uncheck uncertain box of an order
5- click on save button
6- orders who were on page 2 are not display anymore in page uncertainprice.pl
7- return to basket view acqui/basket.pl
8- orders who were on page 2 have "rvcd" label and quantity is null

The data in page 2 and beyond is not transmitted, but the code doesn't
handle that.  This patch makes sure that all that (empty) data is not (wrongly) processed.

Sponsored by: CCSR

Signed-off-by: Nick Clemens <nick@bywatersolutions.com>

Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>

acqui/uncertainprice.pl

@@ -88,6 +88,7 @@ if ( $op eq 'validate' ) {
     for (my $i=0; $i < $count; $i++) {
         my $order = pop(@orders);
         my $ordernumber = $order->{ordernumber};
+        next unless ($input->param('qty'.$ordernumber));
         my $order_as_from_db=GetOrder($order->{ordernumber});
         $order->{'listprice'} = $input->param('price'.$ordernumber);
         $order->{'ecost'}= $input->param('price'.$ordernumber) - (($input->param('price'.$ordernumber) /100) * $bookseller->discount);