[gtk+] gdk: Add missing Since tags for gdk_window_new_child/input

[Rico Tzschichholz <ricotz src gnome org>]

commit 310a1f7e90dfb046db98701f38af0943ce442cc1
Author: Rico Tzschichholz <ricotz ubuntu com>
Date:   Tue Oct 18 13:27:19 2016 +0200

    gdk: Add missing Since tags for gdk_window_new_child/input
    
    In addition to d22e5e69d93401f8f0a040767fbf69ac5643a19d

 gdk/gdkwindow.c |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)
---
diff --git a/gdk/gdkwindow.c b/gdk/gdkwindow.c
index 8206b7b..ec0c916 100644
--- a/gdk/gdkwindow.c
+++ b/gdk/gdkwindow.c
@@ -1493,6 +1493,8 @@ gdk_window_new (GdkWindow     *parent,
  * Creates a new client-side child window.
  *
  * Returns: (transfer full): the new #GdkWindow
+ *
+ * Since: 3.90
  **/
 GdkWindow *
 gdk_window_new_child (GdkWindow          *parent,
@@ -1523,6 +1525,8 @@ gdk_window_new_child (GdkWindow          *parent,
  * Creates a new client-side input-only window.
  *
  * Returns: (transfer full): the new #GdkWindow
+ *
+ * Since: 3.90
  **/
 GdkWindow *
 gdk_window_new_input (GdkWindow          *parent,