[empathy] add doc about empathy_status_presets_is_valid

[Guillaume Desmottes <gdesmott src gnome org>]

commit 0b6193d1e3f336b6d4dcd2b6ce9c90c5ce59edac
Author: Guillaume Desmottes <guillaume desmottes collabora co uk>
Date:   Thu Jun 18 09:38:28 2009 +0100

    add doc about empathy_status_presets_is_valid

 libempathy/empathy-status-presets.c |    8 ++++++++
 1 files changed, 8 insertions(+), 0 deletions(-)
---
diff --git a/libempathy/empathy-status-presets.c b/libempathy/empathy-status-presets.c
index ec3f232..c91895e 100644
--- a/libempathy/empathy-status-presets.c
+++ b/libempathy/empathy-status-presets.c
@@ -406,6 +406,14 @@ empathy_status_presets_clear_default (void)
 	status_presets_file_save ();
 }
 
+/**
+ * empathy_status_presets_is_valid:
+ * @state: a #TpConnectionPresenceType
+ *
+ * Check if a presence type can be used as a preset.
+ *
+ * Returns: %TRUE if the presence type can be used as a preset.
+ */
 gboolean
 empathy_status_presets_is_valid (TpConnectionPresenceType state)
 {