[gtk+] fix mem leak in gtk_drag_set_icon_surface, destroy pattern

[Matthias Clasen <matthiasc src gnome org>]

commit 4445dce697eb343bb7a7ca2ac20b2eeaade927fd
Author: ammonkey <am monkeyd gmail com>
Date:   Wed Aug 8 19:07:17 2012 +0200

    fix mem leak in gtk_drag_set_icon_surface, destroy pattern
    
    https://bugzilla.gnome.org/show_bug.cgi?id=681446

 gtk/gtkdnd.c | 1 +
 1 file changed, 1 insertion(+)
---
diff --git a/gtk/gtkdnd.c b/gtk/gtkdnd.c
index 83655f0..3cf0e5c 100644
--- a/gtk/gtkdnd.c
+++ b/gtk/gtkdnd.c
@@ -3439,6 +3439,7 @@ gtk_drag_set_icon_surface (GdkDragContext    *context,
     }
 
   gdk_window_set_background_pattern (gtk_widget_get_window (window), pattern);
+  cairo_pattern_destroy (pattern);
 
   gtk_drag_set_icon_window (context, window, extents.x, extents.y, TRUE);
 }