[orca] Ensure we use keyval_name when event_string is absent for keyboard events

[Joanmarie Diggs <joanied src gnome org>]

commit 77a4a1986ca4d2d3e4a9f7343a16ee419b0475b7
Author: Joanmarie Diggs <jdiggs igalia com>
Date:   Wed Nov 28 11:31:41 2018 -0500

    Ensure we use keyval_name when event_string is absent for keyboard events

 src/orca/script.py | 5 +++++
 1 file changed, 5 insertions(+)
---
diff --git a/src/orca/script.py b/src/orca/script.py
index 60454704d..7366be50c 100644
--- a/src/orca/script.py
+++ b/src/orca/script.py
@@ -398,6 +398,11 @@ class Script:
         except:
             msg = 'ERROR: Exception getting keyval_name for id: %d' % keyboardEvent.id
             debug.println(debug.LEVEL_INFO, msg, True)
+        else:
+            if keyboardEvent.event_string == '':
+                msg = 'INFO: Setting event_string to: %s' % keyboardEvent.keyval_name
+                debug.println(debug.LEVEL_INFO, msg, True)
+                keyboardEvent.event_string = keyboardEvent.keyval_name
 
     def consumesKeyboardEvent(self, keyboardEvent):
         """Called when a key is pressed on the keyboard.