gtk/gtkcontainer.c: use accessor functions to access GtkWidget

gtk/gtkcontainer.c

@@ -1352,11 +1352,11 @@ gtk_container_get_resize_container (GtkContainer *container)
   GtkWidget *parent;
   GtkWidget *widget = GTK_WIDGET (container);
 
-  while (parent = gtk_widget_get_parent (widget))
+  while (parent = gtk_widget_get_parent (widget))  
     {
       widget = parent;
       if (GTK_IS_RESIZE_CONTAINER (widget))
-	break;
+        break;
     }
 
   return GTK_IS_RESIZE_CONTAINER (widget) ? (GtkContainer*) widget : NULL;