Fixed: 'search titles only' box ignored after one search is done on titles only.

git-svn-id: http://redmine.rubyforge.org/svn/trunk@1684 e93f8b46-1217-0410-a6f0-8f06a7374b81

vendor/plugins/acts_as_searchable/lib/acts_as_searchable.rb

@@ -78,7 +78,7 @@ module Redmine
             end
             
             columns = searchable_options[:columns]
-            columns.slice!(1..-1) if options[:titles_only]
+            columns = columns[0..0] if options[:titles_only]
             
             token_clauses = columns.collect {|column| "(LOWER(#{column}) LIKE ?)"}