[glade] Stop defaulting missing images to deprecated stock icons

[Alberto Fanjul <albfan src gnome org>]

commit d857fc2fd0003ccc4bf1bdc670e9a573a674c9ab
Author: Martin Blanchard <tchaik gmx com>
Date:   Tue Mar 12 00:05:49 2019 +0000

    Stop defaulting missing images to deprecated stock icons
    
    GTK_STOCK_MISSING_IMAGE/"gtk-missing-image" has been deprecated for a
    while now and Adwaita does not ship it anymore under that name. Better
    prefer the new "image-missing" replacement.

 gladeui/glade-widget-adaptor.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/gladeui/glade-widget-adaptor.c b/gladeui/glade-widget-adaptor.c
index fb7babc4..fb452009 100644
--- a/gladeui/glade-widget-adaptor.c
+++ b/gladeui/glade-widget-adaptor.c
@@ -617,7 +617,7 @@ glade_widget_adaptor_constructor (GType                  type,
 
   /* Build decorations */
   if (!adaptor->priv->icon_name)
-    adaptor->priv->icon_name = g_strdup ("gtk-missing-image");
+    adaptor->priv->icon_name = g_strdup ("image-missing");
 
   /* Let it leek */
   if ((object_class = g_type_class_ref (adaptor->priv->type)))