[libsigcplusplus] connection: Make notify() private.

[Murray Cumming <murrayc src gnome org>]

commit 672f831e08c501253566368c5d33185f1e822181
Author: Murray Cumming <murrayc murrayc com>
Date:   Thu Apr 21 17:45:17 2016 +0200

    connection: Make notify() private.

 sigc++/connection.h |    6 +++---
 1 files changed, 3 insertions(+), 3 deletions(-)
---
diff --git a/sigc++/connection.h b/sigc++/connection.h
index 54b462a..a753b21 100644
--- a/sigc++/connection.h
+++ b/sigc++/connection.h
@@ -95,14 +95,14 @@ struct SIGC_API connection : public notifiable
    */
   explicit operator bool() const noexcept;
 
+private:
+  void set_slot(slot_base* sl);
+
   /** Callback that is executed when the referred slot is destroyed.
    * @param data The connection object notified (@p this).
    */
   static void notify(notifiable* data);
 
-private:
-  void set_slot(slot_base* sl);
-
   /* Referred slot. Set to zero from notify().
    * A value of zero indicates an "empty" connection.
    */