[gtksourceview] gutter: chain up when overriding root vfunc

[Christian Hergert <chergert src gnome org>]

commit 6b1ceec1eacdb651b3bd36ef5b85195c49062a64
Author: Christian Hergert <chergert redhat com>
Date:   Fri Apr 29 18:03:32 2022 -0700

    gutter: chain up when overriding root vfunc

 gtksourceview/gtksourcegutter.c | 2 ++
 1 file changed, 2 insertions(+)
---
diff --git a/gtksourceview/gtksourcegutter.c b/gtksourceview/gtksourcegutter.c
index 3c623913..3324325d 100644
--- a/gtksourceview/gtksourcegutter.c
+++ b/gtksourceview/gtksourcegutter.c
@@ -360,6 +360,8 @@ gtk_source_gutter_root (GtkWidget *widget)
 
        g_assert (GTK_SOURCE_IS_GUTTER (widget));
 
+       GTK_WIDGET_CLASS (gtk_source_gutter_parent_class)->root (widget);
+
        parent = gtk_widget_get_parent (widget);
 
        /* The GtkTextViewChild has "overflow" set to Hidden and we