[gobject-introspection] Add allow-none for etag for g_file_replace

[Colin Walters <walters src gnome org>]

commit 3571efc047eed05c816d898e732ac92e8bf76673
Author: Colin Walters <walters verbum org>
Date:   Mon Aug 3 19:54:20 2009 -0400

    Add allow-none for etag for g_file_replace

 gir/gio-2.0.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/gir/gio-2.0.c b/gir/gio-2.0.c
index 55eaf2a..cc68e5d 100644
--- a/gir/gio-2.0.c
+++ b/gir/gio-2.0.c
@@ -380,6 +380,7 @@
 
 /**
  * g_file_replace:
+ * @etag: (allow-none)
  * @cancellable: (allow-none):
  */