[empathy] Print "Unknown command" when typing "/help unknown"

[Xavier Claessens <xclaesse src gnome org>]

commit 937c7947b3ae29cfafc3b6f3f07cf201edfea26c
Author: Xavier Claessens <xclaesse gmail com>
Date:   Tue Nov 3 17:37:37 2009 +0100

    Print "Unknown command" when typing "/help unknown"

 libempathy-gtk/empathy-chat.c |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)
---
diff --git a/libempathy-gtk/empathy-chat.c b/libempathy-gtk/empathy-chat.c
index dc4ab7f..ba439b4 100644
--- a/libempathy-gtk/empathy-chat.c
+++ b/libempathy-gtk/empathy-chat.c
@@ -812,6 +812,9 @@ chat_command_help (EmpathyChat *chat,
 			return;
 		}
 	}
+
+	empathy_chat_view_append_event (chat->view,
+		_("Unknown command"));
 }
 
 static GStrv