[orca] Handle another case of objects going defunct during presentation generation

[Joanmarie Diggs <joanied src gnome org>]

commit ca177f12a8d0b8803f8c2c5a89b3f652121d2d06
Author: Joanmarie Diggs <jdiggs igalia com>
Date:   Wed Oct 17 18:58:55 2018 +0200

    Handle another case of objects going defunct during presentation generation

 src/orca/generator.py | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)
---
diff --git a/src/orca/generator.py b/src/orca/generator.py
index c9b4ac809..e953971b7 100644
--- a/src/orca/generator.py
+++ b/src/orca/generator.py
@@ -413,15 +413,17 @@ class Generator:
         else:
             try:
                 name = obj.name
+                description = obj.description
             except:
-                msg = "ERROR: Exception getting name for %s" % obj
+                msg = "ERROR: Exception getting name and description for %s" % obj
                 debug.println(debug.LEVEL_INFO, msg, True)
                 name = ""
+                description = ""
 
         result = []
-        if obj.description:
+        if description:
             label = self._script.utilities.displayedLabel(obj) or ""
-            desc = obj.description.lower()
+            desc = description.lower()
             if not (desc in name.lower() or desc in label.lower()):
                 result.append(obj.description)