[gtk+] Make gdk_event_get_history public

[Matthias Clasen <matthiasc src gnome org>]

commit 5b63583c0b0af62bb65c8488387de0fe0c9aab91
Author: Matthias Clasen <mclasen redhat com>
Date:   Mon Feb 5 20:28:15 2018 +0100

    Make gdk_event_get_history public
    
    This function is meant to be public, but was missing
    an annotation in the header.

 gdk/gdkevents.h |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/gdk/gdkevents.h b/gdk/gdkevents.h
index 27e0bbc..086ccea 100644
--- a/gdk/gdkevents.h
+++ b/gdk/gdkevents.h
@@ -615,7 +615,7 @@ GDK_AVAILABLE_IN_ALL
 gboolean       gdk_event_get_axes      (GdkEvent  *event,
                                         gdouble  **axes,
                                         guint     *n_axes);
-GDK_AVAILABLE_IN_3_94
+GDK_AVAILABLE_IN_ALL
 GList        * gdk_event_get_motion_history (const GdkEvent  *event);
 
 G_END_DECLS