Fix: Add class names to column header cells before extensions are ini…

…tialised. This allows extensions such as Buttons' column visibility selector to operate on class names given in the column options.

- Thread 34321
- FB 286

js/DataTables.js

@@ -1,11 +1,11 @@
-/*! DataTables 1.10.15
+/*! DataTables 1.10.16-dev
  * ©2008-2017 SpryMedia Ltd - datatables.net/license
  */
 
 /**
  * @summary     DataTables
  * @description Paginate, search and order HTML tables
- * @version     1.10.15
+ * @version     1.10.16-dev
  * @file        jquery.dataTables.js
  * @author      SpryMedia Ltd
  * @contact     www.datatables.net
@@ -169,7 +169,7 @@
 	 *  @type string
 	 *  @default Version number
 	 */
-	DataTable.version = "1.10.15";
+	DataTable.version = "1.10.16-dev";
 
 	/**
 	 * Private data store, containing all of the settings objects that are

js/core/core.columns.js

@@ -81,6 +81,9 @@ function _fnColumnOptions( oSettings, iCol, oOptions )
 		{
 			oOptions.sClass = oOptions.className;
 		}
+		if ( oOptions.sClass ) {
+			th.addClass( oOptions.sClass );
+		}
 
 		$.extend( oCol, oOptions );
 		_fnMap( oCol, oOptions, "sWidth", "sWidthOrig" );