[gtk] cssanimatedstyle: Remove some casts in hot paths

[Timm Bäder <baedert src gnome org>]

commit 36a1b69a19358b852ad28092e1d6a67235de66e3
Author: Timm Bäder <mail baedert org>
Date:   Sat Aug 17 16:12:57 2019 +0200

    cssanimatedstyle: Remove some casts in hot paths
    
    gtk_css_animated_style_create_css_transitions down from 16% to 11%
    when repeatedly clicking on a spinbutton button in the widget factory.

 gtk/gtkcssanimatedstyle.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)
---
diff --git a/gtk/gtkcssanimatedstyle.c b/gtk/gtkcssanimatedstyle.c
index c09ddb01ce..2b75451840 100644
--- a/gtk/gtkcssanimatedstyle.c
+++ b/gtk/gtkcssanimatedstyle.c
@@ -195,17 +195,17 @@ transition_info_add (TransitionInfo    infos[GTK_CSS_PROPERTY_N_PROPERTIES],
         {
           GtkCssStyleProperty *prop = _gtk_css_shorthand_property_get_subproperty (shorthand, i);
 
-          transition_info_add (infos, GTK_STYLE_PROPERTY (prop), index);
+          transition_info_add (infos, (GtkStyleProperty *)prop, index);
         }
     }
   else
     {
       guint id;
 
-      if (!_gtk_css_style_property_is_animated (GTK_CSS_STYLE_PROPERTY (property)))
+      if (!_gtk_css_style_property_is_animated ((GtkCssStyleProperty *) property))
         return;
 
-      id = _gtk_css_style_property_get_id (GTK_CSS_STYLE_PROPERTY (property));
+      id = _gtk_css_style_property_get_id ((GtkCssStyleProperty *) property);
       g_assert (id < GTK_CSS_PROPERTY_N_PROPERTIES);
       infos[id].index = index;
       infos[id].pending = TRUE;
@@ -231,7 +231,7 @@ transition_infos_set (TransitionInfo  infos[GTK_CSS_PROPERTY_N_PROPERTIES],
 
           for (j = 0; j < len; j++)
             {
-              property = GTK_STYLE_PROPERTY (_gtk_css_style_property_lookup_by_id (j));
+              property = (GtkStyleProperty *)_gtk_css_style_property_lookup_by_id (j);
               transition_info_add (infos, property, i);
             }
         }