Fix #502

Author: root

Diff for: lib/redmine/scm/adapters/xitolite_adapter.rb

@@ -173,7 +173,7 @@ def entries(path=nil, identifier=nil, options={})
           entries.sort_by_name
         rescue ScmCommandAborted => e
           logger.error(e.message)
-          nil
+          []
         end