[vala] libxml-2.0: Fix xmlNewDocRawNode binding

[Jürg Billeter <juergbi src gnome org>]

commit 494f7b7006a071c6ad2a1789d3ba91d9f160a455
Author: Martin Olsson <martin minimum se>
Date:   Wed Aug 26 22:09:36 2009 +0200

    libxml-2.0: Fix xmlNewDocRawNode binding
    
    Fixes bug 593219.

 vapi/libxml-2.0.vapi |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/vapi/libxml-2.0.vapi b/vapi/libxml-2.0.vapi
index 9491131..6b0f72e 100644
--- a/vapi/libxml-2.0.vapi
+++ b/vapi/libxml-2.0.vapi
@@ -370,7 +370,7 @@ namespace Xml {
 		public Attr* new_prop (string name, string value);
 
 		[CCode (cname = "xmlNewDocRawNode")]
-		public Node* new_raw_node (Ns* ns, string name, string content);
+		public Node* new_raw_node (Ns* ns, string name, string? content = null);
 
 		[CCode (cname = "xmlNewDocText")]
 		public Node* new_text (string content);