[gtk+] css node: Avoid a duplicate type check

[Matthias Clasen <matthiasc src gnome org>]

commit c8dcb690aacccf56d84195a2470da0aad74c9e29
Author: Matthias Clasen <mclasen redhat com>
Date:   Fri Sep 11 19:05:49 2015 -0400

    css node: Avoid a duplicate type check

 gtk/gtkcssnode.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/gtk/gtkcssnode.c b/gtk/gtkcssnode.c
index 4d2563d..67236b7 100644
--- a/gtk/gtkcssnode.c
+++ b/gtk/gtkcssnode.c
@@ -389,7 +389,7 @@ gtk_css_node_real_update_style (GtkCssNode   *cssnode,
                                               gtk_css_node_get_style_provider (cssnode),
                                               should_create_transitions (change) ? style : NULL);
     }
-  else if (GTK_IS_CSS_ANIMATED_STYLE (style) && (change & GTK_CSS_CHANGE_TIMESTAMP))
+  else if (static_style != style && (change & GTK_CSS_CHANGE_TIMESTAMP))
     {
       new_style = gtk_css_animated_style_new_advance (GTK_CSS_ANIMATED_STYLE (style),
                                                       static_style,