[gtk+] Revert "Fix compilation warning: Use G_POINTER_TO_UINT"

[Tor Lillqvist <tml src gnome org>]

commit 0e87c905395b06ce31cee5238172ce2de739f532
Author: Tor Lillqvist <tml iki fi>
Date:   Tue Nov 10 16:08:23 2009 +0200

    Revert "Fix compilation warning: Use G_POINTER_TO_UINT"
    
    GPOINTER_TO_UINT() *does* drop the upper 32 bits on 64-bit
    Windows. After all, it by definition produces a (32-bit) unsigned int.
    
    The GLib commit mentioned in the reverted commit's log message just
    means that it does this without any compiler warning about casting
    from pointer to integer of smaller size, as it first casts to a 64-bit
    integer, then casts that to a (32-bit) int.
    
    We must use the GdkNativeWindow cast here so that on 64-bit Windows
    the gpointer data in embedded_list is converted to a (64-bit) native
    window handle without going through 32-bit truncation. If ifdefs are
    required to avoid compiler warnings on X11, so be it then. Probably it
    would be best to introduce a GDK_GPOINTER_TO_NATIVE_WINDOW() macro in
    gdktypes.h.
    
    This reverts commit 78151dc7d41069e876fe165527e68c238ef7fd4a.

 gtk/gtkwindow.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/gtk/gtkwindow.c b/gtk/gtkwindow.c
index 5fed54b..ffd9d8a 100644
--- a/gtk/gtkwindow.c
+++ b/gtk/gtkwindow.c
@@ -5315,7 +5315,7 @@ send_client_message_to_embedded_windows (GtkWidget *widget,
       
       while (embedded_windows)
 	{
-	  GdkNativeWindow xid = GPOINTER_TO_UINT (embedded_windows->data);
+	  GdkNativeWindow xid = (GdkNativeWindow) embedded_windows->data;
 	  gdk_event_send_client_message_for_display (gtk_widget_get_display (widget), send_event, xid);
 	  embedded_windows = embedded_windows->next;
 	}