[orca] Fix for bgo#611321 - keybindings.getInputHandler returns unbound commands as potential keybinding ca

[Joanmarie Diggs <joanied src gnome org>]

commit cb1b76127e0ed5e290c90c6bc2be8ba0490b1d18
Author: Joanmarie Diggs <joanmarie diggs gmail com>
Date:   Sat Feb 27 15:35:27 2010 -0500

    Fix for bgo#611321 - keybindings.getInputHandler returns unbound commands as potential keybinding candidates

 src/orca/keybindings.py |    6 +++++-
 1 files changed, 5 insertions(+), 1 deletions(-)
---
diff --git a/src/orca/keybindings.py b/src/orca/keybindings.py
index a647c4f..cebdd2c 100644
--- a/src/orca/keybindings.py
+++ b/src/orca/keybindings.py
@@ -352,7 +352,11 @@ class KeyBindings:
                 if keyBinding.modifier_mask == keyboardEvent.modifiers and \
                    keyBinding.click_count == clickCount:
                     return keyBinding.handler
-                candidates.append(keyBinding)
+                # If there's no keysymstring, it's unbound and cannot be
+                # a match.
+                #
+                if keyBinding.keysymstring:
+                    candidates.append(keyBinding)
 
         # If we're still here, we don't have an exact match. Prefer
         # the one whose click count is closest to, but does not exceed,