[gtkmm] Overlay: Really correct the @newin number.

[Murray Cumming <murrayc src gnome org>]

commit e59d4b5336e40db886e2274e9c88f8a3f69fe618
Author: Murray Cumming <murrayc murrayc com>
Date:   Thu Nov 20 09:04:47 2014 +0100

    Overlay: Really correct the @newin number.

 gtk/src/overlay.hg |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/gtk/src/overlay.hg b/gtk/src/overlay.hg
index 1544768..7cb0e85 100644
--- a/gtk/src/overlay.hg
+++ b/gtk/src/overlay.hg
@@ -43,7 +43,7 @@ namespace Gtk
  * the “type” attribute of a `<child>` element.
  *
  * @ingroup Containers
- * @newin{3,12}
+ * @newin{3,14}
  */
 
 class Overlay