[vala] glib-2.0: Allow null hooks for OptionGroup

[Christian Persch <chpe src gnome org>]

commit 0a8fbe1275c854f3d11f8816c8c96128988d1c81
Author: Christian Persch <chpe gnome org>
Date:   Sun May 11 14:36:26 2014 +0200

    glib-2.0: Allow null hooks for OptionGroup
    
    Allow null pre-parse, post-parse, error and translation hooks.
    
    Fixed bug #729954.

 vapi/glib-2.0.vapi |    6 +++---
 1 files changed, 3 insertions(+), 3 deletions(-)
---
diff --git a/vapi/glib-2.0.vapi b/vapi/glib-2.0.vapi
index 6c493d2..92eba18 100644
--- a/vapi/glib-2.0.vapi
+++ b/vapi/glib-2.0.vapi
@@ -3372,9 +3372,9 @@ namespace GLib {
        public class OptionGroup {
                public OptionGroup (string name, string description, string help_description, void* user_data 
= null, DestroyNotify? destroy = null);
                public void add_entries ([CCode (array_length = false)] OptionEntry[] entries);
-               public void set_parse_hooks (OptionParseFunc pre_parse_func, OptionParseFunc post_parse_hook);
-               public void set_error_hook (OptionErrorFunc error_func);
-               public void set_translate_func (TranslateFunc func, DestroyNotify? destroy_notify);
+               public void set_parse_hooks (OptionParseFunc? pre_parse_func, OptionParseFunc? 
post_parse_hook);
+               public void set_error_hook (OptionErrorFunc? error_func);
+               public void set_translate_func (owned TranslateFunc? func);
                public void set_translation_domain (string domain);
        }