Wrong ordering script in server-side processing example

Hi everyone!

First of all, nice work!

I found a mistake in the examples section for server_side processing. The ordering algorithm does not work properly (tested with Version 1.9.4)

The old code

if ( isset( $_GET['iSortCol_0'] ) )
	{
		$sOrder = "ORDER BY  ";
		for ( $i=0 ; $i<intval( $_GET['iSortingCols'] ) ; $i++ )
		{
			if ( $_GET[ 'bSortable_'.intval($_GET['iSortCol_'.$i]) ] == "true" )
			{
				$sOrder .= $aColumns[ intval( $_GET['iSortCol_'.$i] ) ]."
				 	".mysql_real_escape_string( $_GET['sSortDir_'.$i] ) .", ";
			}
		}
		
		$sOrder = substr_replace( $sOrder, "", -2 );
		if ( $sOrder == "ORDER BY" )
		{
			$sOrder = "";
		}
	}

in my opinion it should look like

if (isset($_GET['iSortCol_0']))
	{
		if ($_GET['bSortable_'.intval($_GET['iSortCol_0'])] == "true")
		{
			$sOrder = "ORDER BY  ";
			$sOrder .= $aColumns[ intval( $_GET['iSortCol_0'] ) ]."
				 	".mysql_real_escape_string( $_GET['sSortDir_0'] ) .", ";
		}
	}

$_GET['iSortCol_0'] gives me the column number to sort
$_GET['bSortable_XY'] if the column can be sorted
$_GET['iSortCol_XY'] does not exist in the request (tested with google chrome developer tools)

In this way, sorting works fine in my application.

Greetings,
Alex