[gtk/matthiasc/for-master] transition demo: Make buttons symbolic

[Matthias Clasen <matthiasc src gnome org>]

commit fd631937f3ebab31e5fd74f7a5011b65598e47f8
Author: Matthias Clasen <mclasen redhat com>
Date:   Wed Sep 30 13:40:59 2020 -0400

    transition demo: Make buttons symbolic
    
    It looks better.

 demos/gtk-demo/gltransition.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/demos/gtk-demo/gltransition.c b/demos/gtk-demo/gltransition.c
index 6b49a3cea5..7d51d32be4 100644
--- a/demos/gtk-demo/gltransition.c
+++ b/demos/gtk-demo/gltransition.c
@@ -259,13 +259,13 @@ make_shader_stack (const char *name,
 
   gtk_box_append (GTK_BOX (vbox), hbox);
 
-  button = gtk_button_new_from_icon_name ("go-previous");
+  button = gtk_button_new_from_icon_name ("go-previous-symbolic");
   g_signal_connect (button, "clicked", G_CALLBACK (go_back), stack);
   bin = ripple_bin_new ();
   gtk_shader_bin_set_child (GTK_SHADER_BIN (bin), button);
   gtk_box_append (GTK_BOX (hbox), bin);
 
-  button = gtk_button_new_from_icon_name ("go-next");
+  button = gtk_button_new_from_icon_name ("go-next-symbolic");
   g_signal_connect (button, "clicked", G_CALLBACK (go_forward), stack);
   bin = ripple_bin_new ();
   gtk_shader_bin_set_child (GTK_SHADER_BIN (bin), button);