[vala/staging] libxml-2.0: Add missing context parameter in OutputWriteCallback

[Rico Tzschichholz <ricotz src gnome org>]

commit 00bd656e90da2f0c797f86998b16586580d8fff3
Author: Rico Tzschichholz <ricotz ubuntu com>
Date:   Wed Sep 19 12:28:47 2018 +0200

    libxml-2.0: Add missing context parameter in OutputWriteCallback

 vapi/libxml-2.0.vapi | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/vapi/libxml-2.0.vapi b/vapi/libxml-2.0.vapi
index e192dc2ff..bfb3afcf9 100644
--- a/vapi/libxml-2.0.vapi
+++ b/vapi/libxml-2.0.vapi
@@ -1066,7 +1066,7 @@ namespace Xml {
        public delegate void* OutputOpenCallback (string filename);
 
        [CCode (has_target = false, cname = "xmlOutputWriteCallback", cheader_filename = "libxml/xmlIO.h")]
-       public delegate int OutputWriteCallback ([CCode (array_length = false)] char[] buffer, int len);
+       public delegate int OutputWriteCallback (void* context, [CCode (array_length = false)] char[] buffer, 
int len);
 
        [CCode (has_target = false, cname = "xmlOutputCloseCallback", cheader_filename = "libxml/xmlIO.h")]
        public delegate int OutputCloseCallback (void * context);