[gtk+] Bug 508601 - Copying from GTK+ applications causes crash

[Kristian Rietveld <kristian src gnome org>]

commit 8d69f3daf258c03e3b8d839cacc15a7b4d12e64d
Author: Kristian Rietveld <kris gtk org>
Date:   Mon Jul 25 22:02:25 2011 +0200

    Bug 508601 - Copying from GTK+ applications causes crash
    
    In GtkClipboardOwner pasteboard:provideDataForType do not call
    _gtk_quartz_set_selection_data_for_pasteboard() is selection_data.length
    is smaller than 0.  The function relies on having a positive length,
    since it stores the length in a uint ...

 gtk/gtkclipboard-quartz.c |    7 ++++---
 1 files changed, 4 insertions(+), 3 deletions(-)
---
diff --git a/gtk/gtkclipboard-quartz.c b/gtk/gtkclipboard-quartz.c
index a77d443..ee7766e 100644
--- a/gtk/gtkclipboard-quartz.c
+++ b/gtk/gtkclipboard-quartz.c
@@ -110,9 +110,10 @@ struct _GtkClipboardClass
       clipboard->get_func (clipboard, &selection_data,
                            info,
                            clipboard->user_data);
- 
-      _gtk_quartz_set_selection_data_for_pasteboard (clipboard->pasteboard,
-                                                     &selection_data);
+
+      if (selection_data.length >= 0)
+        _gtk_quartz_set_selection_data_for_pasteboard (clipboard->pasteboard,
+                                                       &selection_data);
 
       g_free (selection_data.data);
     }