SQL Server needs to quote booleans just like MySQL 1/0

git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@2586 5ecf4fe2-1ee6-0310-87b1-e25e094e27de

activerecord/lib/active_record/connection_adapters/sqlserver_adapter.rb

@@ -293,6 +293,14 @@ module ActiveRecord
         string.gsub(/\'/, "''")
       end
 
+      def quoted_true
+        "1"
+      end
+      
+      def quoted_false
+        "0"
+      end
+
       def quote_column_name(name)
         "[#{name}]"
       end