[gtk/scroll-compression-leak] Fix a leak in scroll event compression

[Matthias Clasen <matthiasc src gnome org>]

commit 0c82aa314c33f72c0cb577dc92e3306c5341ab65
Author: Matthias Clasen <mclasen redhat com>
Date:   Thu Aug 6 19:31:08 2020 -0400

    Fix a leak in scroll event compression
    
    We were leaking the last event in a sequence
    of scroll events.

 gdk/gdkevents.c | 2 ++
 1 file changed, 2 insertions(+)
---
diff --git a/gdk/gdkevents.c b/gdk/gdkevents.c
index c6ee0decb8..67a536462c 100644
--- a/gdk/gdkevents.c
+++ b/gdk/gdkevents.c
@@ -702,6 +702,8 @@ gdk_event_queue_handle_scroll_compression (GdkDisplay *display)
 
       g_queue_delete_link (&display->queued_events, scrolls);
       g_queue_push_tail (&display->queued_events, event);
+
+      gdk_event_unref (old_event);
     }
 
   if (g_queue_get_length (&display->queued_events) == 1 &&