[orca] Adjust workaround for finding a name for nameless checkboxes

[Joanmarie Diggs <joanied src gnome org>]

commit b81bfba41288b22cfb4bbe97293ca0123029a175
Author: Joanmarie Diggs <jdiggs igalia com>
Date:   Tue Dec 8 10:40:15 2020 +0100

    Adjust workaround for finding a name for nameless checkboxes
    
    The fallback in the web code was preventing other fallbacks from
    doing their thing.

 src/orca/scripts/web/braille_generator.py | 3 ++-
 src/orca/scripts/web/speech_generator.py  | 3 ++-
 2 files changed, 4 insertions(+), 2 deletions(-)
---
diff --git a/src/orca/scripts/web/braille_generator.py b/src/orca/scripts/web/braille_generator.py
index de5bdf243..07a548fb6 100644
--- a/src/orca/scripts/web/braille_generator.py
+++ b/src/orca/scripts/web/braille_generator.py
@@ -174,7 +174,8 @@ class BrailleGenerator(braille_generator.BrailleGenerator):
             result[0] = result[0].strip()
         elif not result and obj.getRole() == pyatspi.ROLE_CHECK_BOX:
             gridCell = pyatspi.findAncestor(obj, self._script.utilities.isGridCell)
-            return super()._generateName(gridCell, **args)
+            if gridCell:
+                return super()._generateName(gridCell, **args)
 
         return result
 
diff --git a/src/orca/scripts/web/speech_generator.py b/src/orca/scripts/web/speech_generator.py
index 6db32653d..2b5c242b8 100644
--- a/src/orca/scripts/web/speech_generator.py
+++ b/src/orca/scripts/web/speech_generator.py
@@ -346,7 +346,8 @@ class SpeechGenerator(speech_generator.SpeechGenerator):
 
         if obj.getRole() == pyatspi.ROLE_CHECK_BOX:
             gridCell = pyatspi.findAncestor(obj, self._script.utilities.isGridCell)
-            return super()._generateLabelOrName(gridCell, **args)
+            if gridCell:
+                return super()._generateLabelOrName(gridCell, **args)
 
         return super()._generateLabelOrName(obj, **args)