[gobject-introspection] giscanner: mark GAsyncReadyCallbacks as allow-none

[Dan Winship <danw src gnome org>]

commit 834f928f2032434fa8f54f68c51cc40fa8271733
Author: Dan Winship <danw gnome org>
Date:   Wed Jun 29 08:41:41 2011 -0400

    giscanner: mark GAsyncReadyCallbacks as allow-none
    
    https://bugzilla.gnome.org/show_bug.cgi?id=653484

 giscanner/maintransformer.py           |    1 +
 tests/scanner/Foo-1.0-expected.gir     |    1 +
 tests/scanner/Regress-1.0-expected.gir |    5 ++++-
 3 files changed, 6 insertions(+), 1 deletions(-)
---
diff --git a/giscanner/maintransformer.py b/giscanner/maintransformer.py
index 0fa8905..34d17b4 100644
--- a/giscanner/maintransformer.py
+++ b/giscanner/maintransformer.py
@@ -537,6 +537,7 @@ usage is void (*_gtk_reserved1)(void);"""
         self._adjust_container_type(parent, node, options)
 
         if (OPT_ALLOW_NONE in options or
+            node.type.target_giname == 'Gio.AsyncReadyCallback' or
             node.type.target_giname == 'Gio.Cancellable'):
             node.allow_none = True
 
diff --git a/tests/scanner/Foo-1.0-expected.gir b/tests/scanner/Foo-1.0-expected.gir
index fa5ee93..8b9dc38 100644
--- a/tests/scanner/Foo-1.0-expected.gir
+++ b/tests/scanner/Foo-1.0-expected.gir
@@ -891,6 +891,7 @@ exposed to language bindings.</doc>
         </parameter>
         <parameter name="callback"
                    transfer-ownership="none"
+                   allow-none="1"
                    scope="async"
                    closure="2">
           <type name="Gio.AsyncReadyCallback" c:type="GAsyncReadyCallback"/>
diff --git a/tests/scanner/Regress-1.0-expected.gir b/tests/scanner/Regress-1.0-expected.gir
index e2f2f93..a85f38b 100644
--- a/tests/scanner/Regress-1.0-expected.gir
+++ b/tests/scanner/Regress-1.0-expected.gir
@@ -1598,7 +1598,10 @@ TpAccount::status-changed</doc>
         <type name="none" c:type="void"/>
       </return-value>
       <parameters>
-        <parameter name="callback" transfer-ownership="none" scope="async">
+        <parameter name="callback"
+                   transfer-ownership="none"
+                   allow-none="1"
+                   scope="async">
           <type name="Gio.AsyncReadyCallback" c:type="GAsyncReadyCallback"/>
         </parameter>
       </parameters>