[vala] D-Bus: Fix crash on interfaces without methods in GDBus servers

[Jürg Billeter <juergbi src gnome org>]

commit 5857c8d29a54bc68e8f229de91ba78aa98677ce4
Author: Jürg Billeter <j bitron ch>
Date:   Sat Oct 23 21:51:13 2010 +0200

    D-Bus: Fix crash on interfaces without methods in GDBus servers

 codegen/valagdbusservermodule.vala |    4 +++-
 1 files changed, 3 insertions(+), 1 deletions(-)
---
diff --git a/codegen/valagdbusservermodule.vala b/codegen/valagdbusservermodule.vala
index 9f8813b..51a6869 100644
--- a/codegen/valagdbusservermodule.vala
+++ b/codegen/valagdbusservermodule.vala
@@ -650,7 +650,9 @@ public class Vala.GDBusServerModule : GDBusClientModule {
 			ccode.add_expression (ccall);
 		}
 
-		ccode.close ();
+		if (!first) {
+			ccode.close ();
+		}
 
 		var ccall = new CCodeFunctionCall (new CCodeIdentifier ("g_object_unref"));
 		ccall.add_argument (new CCodeIdentifier ("invocation"));