No quotes around the default date and time format!

git-svn-id: http://svn.code.sf.net/p/itop/code/trunk@4138 a333f486-631f-4898-b8df-5754b55c2be0

webservices/export-v2.php

@@ -197,7 +197,7 @@ function FormatDatesInPreview(sRadioSelector, sPreviewSelector)
 {
 	if ($('#'+sRadioSelector+'_date_time_format_default').prop('checked'))
 	{
-		sPHPFormat = '$sJSDefaultDateTimeFormat';
+		sPHPFormat = $sJSDefaultDateTimeFormat;
 	}
 	else
 	{