[orca] Fix for traceback when determining whether a MouseButtonEvent should be ignored

[Joanmarie Diggs <joanied src gnome org>]

commit ffbc961d34f82b89c24c7c316060e64e1addd5d2
Author: Joanmarie Diggs <jdiggs igalia com>
Date:   Mon Aug 6 11:25:17 2012 +0200

    Fix for traceback when determining whether a MouseButtonEvent should be ignored

 src/orca/input_event.py |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)
---
diff --git a/src/orca/input_event.py b/src/orca/input_event.py
index 1d32778..3098328 100644
--- a/src/orca/input_event.py
+++ b/src/orca/input_event.py
@@ -371,7 +371,8 @@ class KeyboardEvent(InputEvent):
             return False
         if not orca_state.lastInputEvent:
             return False
-        if isinstance(self, MouseButtonEvent):
+        if isinstance(self, MouseButtonEvent) \
+           or isinstance(orca_state.lastInputEvent, MouseButtonEvent):
             return False
         if self.hw_code == orca_state.lastInputEvent.hw_code \
            and self.type == orca_state.lastInputEvent.type: