[kupfer: 10/18] Added check for no alternatives when getting settings.

[Ulrik Sverdrup <usverdrup src gnome org>]

commit f06a95f00cd3904bda7a1377ecaab90598006a96
Author: Karol BÄdkowski <karol bedkowski gmail com>
Date:   Tue Oct 16 18:16:17 2012 +0200

    Added check for no alternatives when getting settings.
    
    Addresses Launchpad bug 841867.
    
    Author: David Schneider <dnschneid gmail com>
    Closes: lp841867

 kupfer/core/settings.py |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)
---
diff --git a/kupfer/core/settings.py b/kupfer/core/settings.py
index 29ffb01..b494960 100644
--- a/kupfer/core/settings.py
+++ b/kupfer/core/settings.py
@@ -393,6 +393,8 @@ class SettingsController (gobject.GObject, pretty.OutputMixin):
 		"""
 		Get a list of (id_, name) tuples for the given @category_key
 		"""
+		if not category_key in self._alternative_validators:
+			return
 		validator = self._alternative_validators[category_key]
 		for (id_, alternative) in self._alternatives[category_key].iteritems():
 			name = alternative["name"]