[orca] Fix traceback in terminal script's skipObjectEvent

[Joanmarie Diggs <joanied src gnome org>]

commit 0ea6349911909e04f9fc86bea1ae707335a70aef
Author: Joanmarie Diggs <jdiggs igalia com>
Date:   Thu Jan 28 19:27:52 2021 +0100

    Fix traceback in terminal script's skipObjectEvent
    
    We cannot guarantee that there will be an associated text-changed:insert
    event for a text-changed:delete event, though we usually see that from
    VTE.

 src/orca/scripts/terminal/script.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/src/orca/scripts/terminal/script.py b/src/orca/scripts/terminal/script.py
index 8f240b3af..3a4896b0c 100644
--- a/src/orca/scripts/terminal/script.py
+++ b/src/orca/scripts/terminal/script.py
@@ -150,7 +150,7 @@ class Script(default.Script):
             if self.utilities.isBackSpaceCommandTextDeletionEvent(event):
                 return False
 
-            newEvent, newTime = self.eventCache.get("object:text-changed:insert")
+            newEvent, newTime = self.eventCache.get("object:text-changed:insert", [None, 0])
 
         if newEvent is None or newEvent.source != event.source:
             return super().skipObjectEvent(event)