colorplane: Set a css name

Every widget should have one.

diff --git a/gtk/gtkcolorplane.c b/gtk/gtkcolorplane.c
index bbe7ac0f2db65c83a7a8cf03c7fdf6675fb45e5c..2c4ae692f219bee56ca9c3dc6577495705c1714c 100644 (file)
--- a/gtk/gtkcolorplane.c
+++ b/gtk/gtkcolorplane.c
@@ -545,6 +545,8 @@ gtk_color_plane_class_init (GtkColorPlaneClass *class)
                                                        GTK_TYPE_ADJUSTMENT,
                                                        GTK_PARAM_WRITABLE |
                                                        G_PARAM_CONSTRUCT_ONLY));
+
+  gtk_widget_class_set_css_name (widget_class, "plane");
 }
 
 GtkWidget *