[orca] Ensure we have a hyperlink object before trying to get its accessible object

[Joanmarie Diggs <joanied src gnome org>]

commit a5636152bb1bd53fd329f60e40174cb6159061f9
Author: Joanmarie Diggs <jdiggs igalia com>
Date:   Sun May 5 19:39:38 2019 -0400

    Ensure we have a hyperlink object before trying to get its accessible object

 src/orca/scripts/web/script_utilities.py | 5 +++++
 1 file changed, 5 insertions(+)
---
diff --git a/src/orca/scripts/web/script_utilities.py b/src/orca/scripts/web/script_utilities.py
index 2b61a8ea2..5df6b5077 100644
--- a/src/orca/scripts/web/script_utilities.py
+++ b/src/orca/scripts/web/script_utilities.py
@@ -3541,6 +3541,11 @@ class Utilities(script_utilities.Utilities):
             return None
 
         hyperlink = hypertext.getLink(index)
+        if not hyperlink:
+            msg = "ERROR: No hyperlink object at index %i for %s" % (index, obj)
+            debug.println(debug.LEVEL_INFO, msg, True)
+            return None
+
         child = hyperlink.getObject(0)
         msg = "WEB: Hyperlink object at index %i for %s is %s" % (index, obj, child)
         debug.println(debug.LEVEL_INFO, msg, True)