[orca] Sanity-check the active window before processing caret-moved events

[Joanmarie Diggs <joanied src gnome org>]

commit 07ca027647100b503285d5819f7e5a2dcff47649
Author: Joanmarie Diggs <jdiggs igalia com>
Date:   Wed Feb 22 13:13:10 2017 -0500

    Sanity-check the active window before processing caret-moved events

 src/orca/scripts/web/script.py |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)
---
diff --git a/src/orca/scripts/web/script.py b/src/orca/scripts/web/script.py
index 7f844f0..b663d61 100644
--- a/src/orca/scripts/web/script.py
+++ b/src/orca/scripts/web/script.py
@@ -1270,6 +1270,8 @@ class Script(default.Script):
     def onCaretMoved(self, event):
         """Callback for object:text-caret-moved accessibility events."""
 
+        self.utilities.sanityCheckActiveWindow()
+
         if self.utilities.isZombie(event.source):
             msg = "WEB: Event source is Zombie"
             debug.println(debug.LEVEL_INFO, msg, True)