[gtk+] window: Plug a memory leak

[Timm Bäder <baedert src gnome org>]

commit ff35fbf1202bdde8d15fdf05f18a8aa9f2809541
Author: Timm Bäder <mail baedert org>
Date:   Sun Nov 19 18:55:32 2017 +0100

    window: Plug a memory leak

 gtk/gtkwindow.c |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)
---
diff --git a/gtk/gtkwindow.c b/gtk/gtkwindow.c
index ac62c4b..1d8a8ba 100644
--- a/gtk/gtkwindow.c
+++ b/gtk/gtkwindow.c
@@ -1834,6 +1834,9 @@ captured_event_cb (GtkWidget *widget,
 
   gtk_widget_set_cursor (widget, cursor);
 
+  if (cursor)
+    g_object_unref (cursor);
+
   return GDK_EVENT_PROPAGATE;
 }