[orca] Fix for bug 666424 - toolkits/gecko/script.py:updateBraille can cause traceback

[Joanmarie Diggs <joanied src gnome org>]

commit bb8def0e93f1c71d86e893bc11a7acedc5dec72d
Author: Joanmarie Diggs <jdiggs igalia com>
Date:   Wed Feb 22 13:08:04 2012 -0500

    Fix for bug 666424 - toolkits/gecko/script.py:updateBraille can cause traceback

 src/orca/scripts/toolkits/Gecko/script.py |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/src/orca/scripts/toolkits/Gecko/script.py b/src/orca/scripts/toolkits/Gecko/script.py
index e697b2c..904b418 100644
--- a/src/orca/scripts/toolkits/Gecko/script.py
+++ b/src/orca/scripts/toolkits/Gecko/script.py
@@ -2222,7 +2222,7 @@ class Script(default.Script):
             # Add whitespace if we need it. [[[TODO: JD - But should we be
             # doing this in the braille generators rather than here??]]]
             #
-            if len(line.regions) \
+            if regions and len(line.regions) \
                and regions[0].string and line.regions[-1].string \
                and not regions[0].string[0] in whitespace \
                and not line.regions[-1].string[-1] in whitespace: