[vala] Fix double free with owned named arguments

[Jürg Billeter <juergbi src gnome org>]

commit 526f97dab283007ab16ca7fdf0561ef3b320a701
Author: Jürg Billeter <j bitron ch>
Date:   Sat Mar 20 18:33:05 2010 +0100

    Fix double free with owned named arguments
    
    Fixes bug 601930.

 vala/valanamedargument.vala |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)
---
diff --git a/vala/valanamedargument.vala b/vala/valanamedargument.vala
index 8fe98d9..f758fbb 100644
--- a/vala/valanamedargument.vala
+++ b/vala/valanamedargument.vala
@@ -1,6 +1,6 @@
 /* valanamedargument.vala
  *
- * Copyright (C) 2009  Jürg Billeter
+ * Copyright (C) 2009-2010  Jürg Billeter
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
@@ -75,6 +75,7 @@ public class Vala.NamedArgument : Expression {
 			return false;
 		}
 
+		inner.target_type = inner.value_type;
 		value_type = inner.value_type;
 
 		return !error;