SQL Server fix: add_lock! logs warning and continues nicely.

git-svn-id: http://dev.rubyonrails.org/svn/rails/adapters/sqlserver@7985 5ecf4fe2-1ee6-0310-87b1-e25e094e27de

Author: lawrence

lib/active_record/connection_adapters/sqlserver_adapter.rb

@@ -417,6 +417,11 @@ def add_limit_offset!(sql, options)
         end
       end
 
+      def add_lock!(sql, options)
+        @logger.info "Warning: SQLServer :lock option '#{options[:lock].inspect}' not supported" if @logger && options.has_key?(:lock)
+        sql
+      end
+
       def recreate_database(name)
         drop_database(name)
         create_database(name)