[gobject-introspection] Add Since: for g_arg_info_is_skip()

[Colin Walters <walters src gnome org>]

commit 1e8e36ad1875c55ed640d53e03cf891ea398ad8a
Author: Colin Walters <walters verbum org>
Date:   Fri May 13 14:23:05 2011 -0400

    Add Since: for g_arg_info_is_skip()

 girepository/giarginfo.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/girepository/giarginfo.c b/girepository/giarginfo.c
index 069ecce..0d1f0bb 100644
--- a/girepository/giarginfo.c
+++ b/girepository/giarginfo.c
@@ -171,6 +171,7 @@ g_arg_info_may_be_null (GIArgInfo *info)
  * Obtain if an argument is only useful in C.
  *
  * Returns: %TRUE if argument is only useful in C.
+ * Since: 1.29.0
  */
 gboolean
 g_arg_info_is_skip (GIArgInfo *info)