[orca] Fix traceback

[Joanmarie Diggs <joanied src gnome org>]

commit e5a6b962a64dbebcb6dd0ea8ead8ffffa9ad32ce
Author: Joanmarie Diggs <jdiggs igalia com>
Date:   Tue Sep 6 09:48:58 2016 -0400

    Fix traceback

 src/orca/chat.py |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/src/orca/chat.py b/src/orca/chat.py
index e5d11c0..4431f3a 100644
--- a/src/orca/chat.py
+++ b/src/orca/chat.py
@@ -592,7 +592,7 @@ class Chat:
 
         text = ""
         if _settingsManager.getSetting('chatSpeakRoomName') and chatRoomName:
-            text = message.CHAT_MESSAGE_FROM_ROOM % chatRoomName
+            text = messages.CHAT_MESSAGE_FROM_ROOM % chatRoomName
         text = self._script.utilities.appendString(text, message)
 
         if len(text.strip()):