[empathy: 7/19] chat_send_error_cb: don't display the message if it's NULL

[Guillaume Desmottes <gdesmott src gnome org>]

commit 92ff1b9177bd6d8633b8d92357e5081db0e9554f
Author: Guillaume Desmottes <guillaume desmottes collabora co uk>
Date:   Mon Apr 18 14:38:46 2011 +0200

    chat_send_error_cb: don't display the message if it's NULL

 libempathy-gtk/empathy-chat.c |   11 ++++++++---
 1 files changed, 8 insertions(+), 3 deletions(-)
---
diff --git a/libempathy-gtk/empathy-chat.c b/libempathy-gtk/empathy-chat.c
index b7c5192..2d906b0 100644
--- a/libempathy-gtk/empathy-chat.c
+++ b/libempathy-gtk/empathy-chat.c
@@ -1295,9 +1295,14 @@ chat_send_error_cb (EmpathyTpChat          *tp_chat,
 		break;
 	}
 
-	str = g_strdup_printf (_("Error sending message '%s': %s"),
-			       message_body,
-			       error);
+	if (message_body != NULL) {
+			str = g_strdup_printf (_("Error sending message '%s': %s"),
+				message_body, error);
+	}
+	else {
+			str = g_strdup_printf (_("Error sending message: %s"), error);
+	}
+
 	empathy_chat_view_append_event (chat->view, str);
 	g_free (str);
 }