[gnome-builder] greeter: destroy genesis addins when destroying

[Christian Hergert <chergert src gnome org>]

commit 4c585ee3bcee1341dab2d3833cb5b7ef885ec0dd
Author: Christian Hergert <chergert redhat com>
Date:   Sun Jun 10 19:02:29 2018 -0700

    greeter: destroy genesis addins when destroying
    
    We don't want to leak these addins, so make sure we remove them when we
    start destroying the greeter.

 src/libide/greeter/ide-greeter-perspective.c | 2 ++
 1 file changed, 2 insertions(+)
---
diff --git a/src/libide/greeter/ide-greeter-perspective.c b/src/libide/greeter/ide-greeter-perspective.c
index a18ff4bbd..5abe7a70d 100644
--- a/src/libide/greeter/ide-greeter-perspective.c
+++ b/src/libide/greeter/ide-greeter-perspective.c
@@ -1239,6 +1239,8 @@ ide_greeter_perspective_destroy (GtkWidget *widget)
 {
   IdeGreeterPerspective *self = (IdeGreeterPerspective *)widget;
 
+  g_clear_object (&self->genesis_set);
+
   if (self->titlebar != NULL)
     gtk_widget_destroy (GTK_WIDGET (self->titlebar));