[orca] Be sure we have a last input event before checking its time for live region presentation

[Joanmarie Diggs <joanied src gnome org>]

commit 427c6dbbec2eb773f0b7a1da82c8211f7f69440b
Author: Joanmarie Diggs <jdiggs igalia com>
Date:   Fri Dec 21 13:25:06 2012 +0100

    Be sure we have a last input event before checking its time for live region presentation

 src/orca/liveregions.py |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/src/orca/liveregions.py b/src/orca/liveregions.py
index 1f6017c..5fb4aa0 100644
--- a/src/orca/liveregions.py
+++ b/src/orca/liveregions.py
@@ -199,6 +199,7 @@ class LiveRegionManager:
         # parameters such as rate,expanded text and others must be considered.
         if len(self.msg_queue) > 0 \
                   and not speech.isSpeaking() \
+                  and orca_state.lastInputEvent \
                   and time.time() - orca_state.lastInputEvent.time > 1:
             # House cleaning on the message queue.  
             # First we will purge the queue of old messages