[gdl] Update style to avoid warnings

[Sebastien Granjoux <sgranjoux src gnome org>]

commit 3508a8ad637898b2ae312012646f3648d37ef42c
Author: Sébastien Granjoux <seb sfo free fr>
Date:   Sun Aug 20 14:18:55 2017 +0200

    Update style to avoid warnings

 gdl/gdl-switcher.c |    3 +--
 1 files changed, 1 insertions(+), 2 deletions(-)
---
diff --git a/gdl/gdl-switcher.c b/gdl/gdl-switcher.c
index 8f2a9c8..3679c7b 100644
--- a/gdl/gdl-switcher.c
+++ b/gdl/gdl-switcher.c
@@ -869,8 +869,7 @@ gdl_switcher_class_init (GdlSwitcherClass *klass)
     GObjectClass *object_class = G_OBJECT_CLASS (klass);
     static const gchar button_style[] =
        "* {\n"
-           "-GtkWidget-focus-line-width : 1;\n"
-           "-GtkWidget-focus-padding : 1;\n"
+           "outline-width : 1px;\n"
            "padding: 0;\n"
        "}";