Improve object shape

Author: n-rodriguez

lib/ajax-datatables-rails/base.rb

@@ -21,6 +21,7 @@ def initialize(params, options = {})
       @options   = options
       @datatable = Datatable::Datatable.new(self)
 
+      @view_columns       = nil
       @connected_columns  = nil
       @searchable_columns = nil
       @search_columns     = nil