[gtk+] Avoid warnings when handling SelectionNotify

[Matthias Clasen <matthiasc src gnome org>]

commit 375d19aa9258662a9406c00cfb2e7cc418214dbe
Author: Matthias Clasen <mclasen redhat com>
Date:   Sun May 17 18:34:21 2009 -0400

    Avoid warnings when handling SelectionNotify
    
    The property field in SelectionNotify events may be None instead
    of an atom.
---
 gdk/x11/gdkevents-x11.c |    5 ++++-
 1 files changed, 4 insertions(+), 1 deletions(-)

diff --git a/gdk/x11/gdkevents-x11.c b/gdk/x11/gdkevents-x11.c
index 096c170..359471d 100644
--- a/gdk/x11/gdkevents-x11.c
+++ b/gdk/x11/gdkevents-x11.c
@@ -1985,7 +1985,10 @@ gdk_event_translate (GdkDisplay *display,
       event->selection.window = window;
       event->selection.selection = gdk_x11_xatom_to_atom_for_display (display, xevent->xselection.selection);
       event->selection.target = gdk_x11_xatom_to_atom_for_display (display, xevent->xselection.target);
-      event->selection.property = gdk_x11_xatom_to_atom_for_display (display, xevent->xselection.property);
+      if (xevent->xselection.property == None)
+        event->selection.property = GDK_NONE;
+      else
+        event->selection.property = gdk_x11_xatom_to_atom_for_display (display, xevent->xselection.property);
       event->selection.time = xevent->xselection.time;
       
       break;