remove gtk_pizza_expose, its purpose is easily accomplished from existing expose-event handler in window.cpp

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@42042 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/gtk/window.cpp

@@ -465,7 +465,12 @@ gtk_window_expose_callback( GtkWidget *widget,
     // time anymore.
 
     GtkPizza *pizza = GTK_PIZZA( widget );
-    if (gdk_event->window != pizza->bin_window) return FALSE;
+    if (gdk_event->window != pizza->bin_window)
+    {
+        // block expose events on GTK_WIDGET(pizza)->window,
+        //   all drawing is done on pizza->bin_window
+        return true;
+    }
 
 
 #if 0