Update: The _ option for columns.render as an object is optional now

- Previously when using columns.render as an object, you had to supply
  an `_` option which was the fallback. However, I've now made it so
  that if there is no `_` option it will just use the raw data from
  `columns.data`

.datatables-commit-sync

@@ -1 +1 @@
-dfdf6371182e92cc53cdac96a01ae9316c30702b
+a7e482203d8a79d537f2bcffba763f852af12ce3

media/js/jquery.dataTables.js

@@ -1091,7 +1091,10 @@
 			} );
 	
 			return function (data, type, extra) {
-				return o[ o[type] !== undefined ? type : '_' ](data, type, extra);
+				var t = o[type] || o._;
+				return t !== undefined ?
+					t(data, type, extra) :
+					data;
 			};
 		}
 		else if ( mSource === null )