[orca] Don't set new focus to context object if context object is zombie

[Joanmarie Diggs <joanied src gnome org>]

commit d9aa35e86cf9145a5bf14cd4b153f9040f003c5a
Author: Joanmarie Diggs <jdiggs igalia com>
Date:   Mon Apr 11 17:07:10 2016 -0400

    Don't set new focus to context object if context object is zombie

 src/orca/scripts/web/script.py |    4 +++-
 1 files changed, 3 insertions(+), 1 deletions(-)
---
diff --git a/src/orca/scripts/web/script.py b/src/orca/scripts/web/script.py
index bf1cc14..50591c1 100644
--- a/src/orca/scripts/web/script.py
+++ b/src/orca/scripts/web/script.py
@@ -1007,7 +1007,9 @@ class Script(default.Script):
 
         caretOffset = 0
         if not oldFocus or self.utilities.inFindToolbar(oldFocus):
-            newFocus, caretOffset = self.utilities.getCaretContext()
+            contextObj, contextOffset = self.utilities.getCaretContext()
+            if contextObj and not self.utilities.isZombie(contextObj):
+                newFocus, caretOffset = contextObj, contextOffset
 
         if newFocus.getRole() == pyatspi.ROLE_UNKNOWN:
             msg = "WEB: Event source has bogus role. Likely browser bug."