[aisleriot] board: Add comment with bug number to workaround

[Christian Persch <chpe src gnome org>]

commit cedc6b7da2c356469adcde3af3594034242a0a05
Author: Christian Persch <chpe gnome org>
Date:   Sun Nov 10 00:01:42 2013 +0100

    board: Add comment with bug number to workaround

 src/board-noclutter.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)
---
diff --git a/src/board-noclutter.c b/src/board-noclutter.c
index 189cba5..710b31b 100644
--- a/src/board-noclutter.c
+++ b/src/board-noclutter.c
@@ -894,6 +894,8 @@ drag_begin (AisleriotBoard *board)
 
   priv->moving_cards_window = gdk_window_new (window, &attributes,
                                               GDK_WA_VISUAL | GDK_WA_X | GDK_WA_Y);
+
+  /* FIXME: workaround for gtk+ bug #702951 */
   gdk_window_ensure_native (priv->moving_cards_window);
 
   surface = gdk_window_create_similar_surface (priv->moving_cards_window, CAIRO_CONTENT_COLOR_ALPHA,