[orca/gnome-3-20] Fix traceback

[Joanmarie Diggs <joanied src gnome org>]

commit ca6582dbde3dcd4d3ac473a3ab01e084eba3efac
Author: Joanmarie Diggs <jdiggs igalia com>
Date:   Tue Apr 5 17:18:08 2016 -0400

    Fix traceback

 src/orca/script_utilities.py |    6 ++++++
 1 files changed, 6 insertions(+), 0 deletions(-)
---
diff --git a/src/orca/script_utilities.py b/src/orca/script_utilities.py
index eeeeeb5..925585d 100644
--- a/src/orca/script_utilities.py
+++ b/src/orca/script_utilities.py
@@ -664,6 +664,12 @@ class Utilities:
 
         return toolbar != None
 
+    def isComboBoxWithToggleDescendant(self, obj):
+        return False
+
+    def isToggleDescendantOfComboBox(self, obj):
+        return False
+
     def isFunctionalDialog(self, obj):
         """Returns True if the window is a functioning as a dialog.
         This method should be subclassed by application scripts as