[vala] Fix DelegateType.copy

[Jürg Billeter <juergbi src gnome org>]

commit f2ab9828212e417cab5701b77e727ee895c5ce29
Author: Jürg Billeter <j bitron ch>
Date:   Tue Mar 29 11:57:13 2011 +0200

    Fix DelegateType.copy

 vala/valadelegatetype.vala |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)
---
diff --git a/vala/valadelegatetype.vala b/vala/valadelegatetype.vala
index da17014..11648ca 100644
--- a/vala/valadelegatetype.vala
+++ b/vala/valadelegatetype.vala
@@ -102,6 +102,8 @@ public class Vala.DelegateType : DataType {
 			result.add_type_argument (arg.copy ());
 		}
 
+		result.is_called_once = is_called_once;
+
 		return result;
 	}