[gnome-builder] vcs: don't leak monitor root GFile

[Christian Hergert <chergert src gnome org>]

commit df0eeb4bf1764113db8847d3864326cb12408e2b
Author: Christian Hergert <chergert redhat com>
Date:   Fri Aug 3 14:13:30 2018 -0700

    vcs: don't leak monitor root GFile

 src/libide/vcs/ide-vcs-monitor.c | 2 ++
 1 file changed, 2 insertions(+)
---
diff --git a/src/libide/vcs/ide-vcs-monitor.c b/src/libide/vcs/ide-vcs-monitor.c
index 51ef10a40..5f7734ac0 100644
--- a/src/libide/vcs/ide-vcs-monitor.c
+++ b/src/libide/vcs/ide-vcs-monitor.c
@@ -315,6 +315,8 @@ ide_vcs_monitor_dispose (GObject *object)
       g_clear_object (&self->monitor);
     }
 
+  g_clear_object (&self->root);
+
   G_OBJECT_CLASS (ide_vcs_monitor_parent_class)->dispose (object);
 }