[pygobject] Make cancellable an optional parameter in GFile.create_readwrite()

[Gian Mario Tagliaretti <gianmt src gnome org>]

commit 0bff01bcee73a0e0d18342331136119c4e8bf151
Author: Gian Mario Tagliaretti <gianmt gnome org>
Date:   Mon Dec 28 22:39:09 2009 +0100

    Make cancellable an optional parameter in GFile.create_readwrite()

 gio/gio.defs |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/gio/gio.defs b/gio/gio.defs
index ac9309f..dcf3156 100644
--- a/gio/gio.defs
+++ b/gio/gio.defs
@@ -3015,7 +3015,7 @@
   (return-type "GFileIOStream*")
   (parameters
     '("GFileCreateFlags" "flags")
-    '("GCancellable*" "cancellable")
+    '("GCancellable*" "cancellable" (null-ok) (default "NULL"))
     '("GError**" "error")
   )
 )