[vala] codegen: Use set_delegate_target for null literals

[Jürg Billeter <juergbi src gnome org>]

commit fc293ae466e5b031ee220320fe70a09723e5be67
Author: Jürg Billeter <j bitron ch>
Date:   Sat Oct 9 18:29:20 2010 +0200

    codegen: Use set_delegate_target for null literals

 codegen/valaccodebasemodule.vala |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)
---
diff --git a/codegen/valaccodebasemodule.vala b/codegen/valaccodebasemodule.vala
index 8312350..6bf4ea6 100644
--- a/codegen/valaccodebasemodule.vala
+++ b/codegen/valaccodebasemodule.vala
@@ -3547,10 +3547,13 @@ public class Vala.CCodeBaseModule : CodeGenerator {
 		set_cvalue (expr, new CCodeConstant ("NULL"));
 
 		var array_type = expr.target_type as ArrayType;
+		var delegate_type = expr.target_type as DelegateType;
 		if (array_type != null) {
 			for (int dim = 1; dim <= array_type.rank; dim++) {
 				append_array_size (expr, new CCodeConstant ("0"));
 			}
+		} else if (delegate_type != null && delegate_type.delegate_symbol.has_target) {
+			set_delegate_target (expr, new CCodeConstant ("NULL"));
 		}
 	}