[gtk+/gtk-2-16] Don't enforce property change events on the root window

[Matthias Clasen <matthiasc src gnome org>]

commit 5d8a4f78aba64aea32d3bad8a3a8a1e1fd2bf361
Author: Matthias Clasen <mclasen redhat com>
Date:   Sun May 10 01:54:43 2009 -0400

    Don't enforce property change events on the root window
    
    The code in gdk_x11_window_set_events is only meant to enforce
    property change events on child windows. Pointed out in bug 531490.
---
 gdk/x11/gdkwindow-x11.c |    5 +++--
 1 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/gdk/x11/gdkwindow-x11.c b/gdk/x11/gdkwindow-x11.c
index 0a09f67..8296674 100644
--- a/gdk/x11/gdkwindow-x11.c
+++ b/gdk/x11/gdkwindow-x11.c
@@ -3557,13 +3557,14 @@ static void
 gdk_window_x11_set_events (GdkWindow    *window,
                            GdkEventMask  event_mask)
 {
-  long xevent_mask;
+  long xevent_mask = 0;
   int i;
   
   if (!GDK_WINDOW_DESTROYED (window))
     {
       GDK_WINDOW_OBJECT (window)->event_mask = event_mask;
-      xevent_mask = StructureNotifyMask | PropertyChangeMask;
+      if (GDK_WINDOW_XID (window) != GDK_WINDOW_XROOTWIN (window))
+        xevent_mask = StructureNotifyMask | PropertyChangeMask;
       for (i = 0; i < _gdk_nenvent_masks; i++)
 	{
 	  if (event_mask & (1 << (i + 1)))