[orca] Fix Say All bug for Gecko content

[Joanmarie Diggs <joanied src gnome org>]

commit ec7c509136cc53e45b68e8e63a19d1684b334e2e
Author: Joanmarie Diggs <jdiggs igalia com>
Date:   Fri May 15 12:27:33 2015 -0400

    Fix Say All bug for Gecko content

 src/orca/scripts/toolkits/Gecko/script.py |    6 +++++-
 1 files changed, 5 insertions(+), 1 deletions(-)
---
diff --git a/src/orca/scripts/toolkits/Gecko/script.py b/src/orca/scripts/toolkits/Gecko/script.py
index a1523ae..dce94c9 100644
--- a/src/orca/scripts/toolkits/Gecko/script.py
+++ b/src/orca/scripts/toolkits/Gecko/script.py
@@ -732,7 +732,11 @@ class Script(default.Script):
         sayAllStyle = _settingsManager.getSetting('sayAllStyle')
         sayAllBySentence = sayAllStyle == settings.SAYALL_STYLE_SENTENCE
         if offset == None:
-            [obj, characterOffset] = self.getCaretContext()
+            contextObj, contextOffset = self.getCaretContext()
+            if contextObj:
+                [obj, characterOffset] = contextObj, contextOffset
+            else:
+                characterOffset = 0
         else:
             characterOffset = offset