[interchange] Refrain from updating latest_subtotal session key on [subtotal nodiscount=1].

commit e42f2e7513dcf3cd5d23cad1e3cf2727a8f5d248
Author: Stefan Hornburg (Racke) <[email protected]>
Date:   Thu Jul 22 10:37:23 2010 +0200

    Refrain from updating latest_subtotal session key on [subtotal nodiscount=1].

 lib/Vend/Interpolate.pm |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)
---
diff --git a/lib/Vend/Interpolate.pm b/lib/Vend/Interpolate.pm
index 4462632..c02f6f1 100644
--- a/lib/Vend/Interpolate.pm
+++ b/lib/Vend/Interpolate.pm
@@ -5784,12 +5784,13 @@ sub subtotal {
 			$subtotal = $cost;
 		}
 
+		$Vend::Session->{latest_subtotal} = $subtotal;
+		
 		# Switch to original discount space if an actual switch occured.
 		switch_discount_space($oldspace) if $dspace and defined $oldspace;
 	}
 	
 	$Vend::Items = $save if defined $save;
-	$Vend::Session->{latest_subtotal} = $subtotal;
 
     return $subtotal;
 }