[orca] Fix regression in which dimensions of table being left were spoken

[Joanmarie Diggs <joanied src gnome org>]

commit b75c7b2d315dc285186df205f6010c20e83d5338
Author: Joanmarie Diggs <jdiggs igalia com>
Date:   Mon Jan 16 09:54:07 2017 -0500

    Fix regression in which dimensions of table being left were spoken

 src/orca/speech_generator.py |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)
---
diff --git a/src/orca/speech_generator.py b/src/orca/speech_generator.py
index e2888c2..d2842e3 100644
--- a/src/orca/speech_generator.py
+++ b/src/orca/speech_generator.py
@@ -286,6 +286,9 @@ class SpeechGenerator(generator.Generator):
         if _settingsManager.getSetting('onlySpeakDisplayedText'):
             return []
 
+        if args.get("leaving"):
+            return[]
+
         if self._script.utilities.isTextDocumentTable(obj):
             role = args.get('role', obj.getRole())
             enabled, disabled = self._getEnabledAndDisabledContextRoles()