[empathy] tp-contact-factory: allow _get_from_handles to call with no handles.

[Jonny Lamb <jonnylamb src gnome org>]

commit b65f80f53709c7dd9235612d7277c282f9193e81
Author: Jonny Lamb <jonny lamb collabora co uk>
Date:   Sun Sep 6 17:34:04 2009 +0100

    tp-contact-factory: allow _get_from_handles to call with no handles.
    
    Signed-off-by: Jonny Lamb <jonny lamb collabora co uk>

 libempathy/empathy-tp-contact-factory.c |    5 +++++
 1 files changed, 5 insertions(+), 0 deletions(-)
---
diff --git a/libempathy/empathy-tp-contact-factory.c b/libempathy/empathy-tp-contact-factory.c
index 6b4c20b..c990b92 100644
--- a/libempathy/empathy-tp-contact-factory.c
+++ b/libempathy/empathy-tp-contact-factory.c
@@ -1047,6 +1047,11 @@ empathy_tp_contact_factory_get_from_handles (EmpathyTpContactFactory *tp_factory
 	EmpathyTpContactFactoryPriv *priv = GET_PRIV (tp_factory);
 	GetContactsData *data;
 
+	if (n_handles == 0) {
+		callback (tp_factory, 0, NULL, 0, NULL, NULL, user_data, weak_object);
+		return;
+	}
+
 	g_return_if_fail (EMPATHY_IS_TP_CONTACT_FACTORY (tp_factory));
 	g_return_if_fail (handles != NULL);