[orca] Handle \ufffc without corresponding child when expanding embedded objects

[Joanmarie Diggs <joanied src gnome org>]

commit 1dc1b761b21cf9a83bf96afa685b6b63859b7f2c
Author: Joanmarie Diggs <jdiggs igalia com>
Date:   Thu Apr 30 16:38:42 2020 -0400

    Handle \ufffc without corresponding child when expanding embedded objects
    
    It's possible that we won't be able to retrieve a child for a given
    offset with an embedded object character. In that case, we still want
    to eliminate/replace the embedded object character but need to check
    for this condition before attempting to get the role of the child.

 src/orca/script_utilities.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/src/orca/script_utilities.py b/src/orca/script_utilities.py
index 150ea87ec..25ee8e941 100644
--- a/src/orca/script_utilities.py
+++ b/src/orca/script_utilities.py
@@ -2834,7 +2834,7 @@ class Utilities:
             if char == self.EMBEDDED_OBJECT_CHARACTER:
                 child = self.getChildAtOffset(obj, i + startOffset)
                 result = self.expandEOCs(child)
-                if child.getRole() in blockRoles:
+                if child and child.getRole() in blockRoles:
                     result += " "
                 toBuild[i] = result