[glade] Webkit2gtk: Fix compiler warning

[Juan Pablo Ugarte <jpu src gnome org>]

commit e1be03cb11164e5e5e95dfd02823f06aa3456c54
Author: Juan Pablo Ugarte <juanpablougarte gmail com>
Date:   Wed Jun 17 18:56:12 2020 -0300

    Webkit2gtk: Fix compiler warning

 plugins/webkit2gtk/glade-webkit2gtk.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/plugins/webkit2gtk/glade-webkit2gtk.c b/plugins/webkit2gtk/glade-webkit2gtk.c
index e680cef5..170ee918 100644
--- a/plugins/webkit2gtk/glade-webkit2gtk.c
+++ b/plugins/webkit2gtk/glade-webkit2gtk.c
@@ -43,7 +43,7 @@ glade_webkit_web_view_set_property (GladeWidgetAdaptor *adaptor,
   if (g_str_equal(id, "glade-url"))
     {
       const gchar *url = g_value_get_string (value);
-      g_autofree gchar *scheme, *full_url;
+      g_autofree gchar *scheme = NULL, *full_url = NULL;
 
       if (!url)
         return;