patch for slipping modification index

[edstrom@teleport.com]

A patch for lib/Vend/Interpolate.pm version 3.14 to eliminate slipage of
modifier index when items are deleted from the middle of the shopping
cart.


3461,3467d3460
<           unless (defined($item->{NN}) and  $item->{NN} >= 0) {
<               if (defined $cart->[$#$cart]->{NN}) {
<                   $item->{NN} = $cart->[$#$cart]->{NN} + 1;
<               } else {
<                   $item->{NN} = $i;
<               }
<           }
3469d3461
<           my $NN = $item->{NN};
3487c3479
<               $run =~ s:$T{'modifier-name'}$Spacef(\w+)\]:$1$NN:go;
---
>               $run =~ s:$T{'modifier-name'}$Spacef(\w+)\]:$1$i:go;