[gtk+/gtk-3-4] gdk: add missing annotations to gdk_event_get_scroll_deltas

[Matthias Clasen <matthiasc src gnome org>]

commit 2138dfa39380d5340c4d4ad9d46c2893a7ade7e9
Author: Torsten SchÃnfeld <kaffeetisch gmx de>
Date:   Sat Jun 9 23:45:23 2012 +0200

    gdk: add missing annotations to gdk_event_get_scroll_deltas
    
    https://bugzilla.gnome.org/show_bug.cgi?id=677774

 gdk/gdkevents.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/gdk/gdkevents.c b/gdk/gdkevents.c
index 21061d9..204863c 100644
--- a/gdk/gdkevents.c
+++ b/gdk/gdkevents.c
@@ -1215,8 +1215,8 @@ gdk_event_get_scroll_direction (const GdkEvent *event,
 /**
  * gdk_event_get_scroll_deltas:
  * @event: a #GdkEvent
- * @delta_x: return location for X delta
- * @delta_y: return location for Y delta
+ * @delta_x: (out): return location for X delta
+ * @delta_y: (out): return location for Y delta
  *
  * Retrieves the scroll deltas from a #GdkEvent
  *