[gnome-settings-daemon] wacom: Document hashtable contents

[Bastien Nocera <hadess src gnome org>]

commit 22667fd6a9864967d403bbd79e07ac0ab4b1333f
Author: Bastien Nocera <hadess hadess net>
Date:   Thu Feb 23 17:21:36 2012 +0100

    wacom: Document hashtable contents

 plugins/wacom/gsd-wacom-manager.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/plugins/wacom/gsd-wacom-manager.c b/plugins/wacom/gsd-wacom-manager.c
index 067c12c..0119a7e 100644
--- a/plugins/wacom/gsd-wacom-manager.c
+++ b/plugins/wacom/gsd-wacom-manager.c
@@ -73,7 +73,7 @@ struct GsdWacomManagerPrivate
         GdkDeviceManager *device_manager;
         guint device_added_id;
         guint device_removed_id;
-        GHashTable *devices;
+        GHashTable *devices; /* key = GdkDevice, value = GsdWacomDevice */
 
         /* button capture */
         GSList *screens;