[gtk+/gtk-3-22] Revert "css: Fix segfault when GtkCssStyleChange is NULL on gtk_widget_real_style_updated()"

[Matthias Clasen <matthiasc src gnome org>]

commit f44af2e6ae0c023b94794f790a62dc490922eba5
Author: Matthias Clasen <mclasen redhat com>
Date:   Sun Dec 17 11:20:15 2017 -0500

    Revert "css: Fix segfault when GtkCssStyleChange is NULL on gtk_widget_real_style_updated()"
    
    This reverts commit 7e253f4bd3977a67cf7040ce11e24b9d06100f6a.

 gtk/gtkwidget.c |    8 +++-----
 1 files changed, 3 insertions(+), 5 deletions(-)
---
diff --git a/gtk/gtkwidget.c b/gtk/gtkwidget.c
index ff6d59d..ee4ae27 100644
--- a/gtk/gtkwidget.c
+++ b/gtk/gtkwidget.c
@@ -8162,15 +8162,12 @@ static void
 gtk_widget_real_style_updated (GtkWidget *widget)
 {
   GtkWidgetPrivate *priv = widget->priv;
-  GtkCssStyleChange *change = NULL;
 
   gtk_widget_update_alpha (widget);
 
   if (widget->priv->context)
-    change = gtk_style_context_get_change (widget->priv->context);
-
-  if (change)
     {
+      GtkCssStyleChange *change = gtk_style_context_get_change (widget->priv->context);
       const gboolean has_text = gtk_widget_peek_pango_context (widget) != NULL;
 
       if (has_text && gtk_css_style_change_affects (change, GTK_CSS_AFFECTS_TEXT))
@@ -8178,7 +8175,8 @@ gtk_widget_real_style_updated (GtkWidget *widget)
 
       if (widget->priv->anchored)
         {
-          if (gtk_css_style_change_affects (change, GTK_CSS_AFFECTS_SIZE) ||
+          if (change == NULL ||
+              gtk_css_style_change_affects (change, GTK_CSS_AFFECTS_SIZE) ||
               (has_text && gtk_css_style_change_affects (change, GTK_CSS_AFFECTS_TEXT_SIZE)))
             {
               gtk_widget_queue_resize (widget);