修正FLEA_Helper_Pager,让其支持source为sql时的多数据库操作

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<?phpclass Application extends FLEA_Controller_Action {/**     * 后台首页     */    function actionIndex() {FLEA::loadHelper('pager');$sql = 'select * from nodes';$pager = & new FLEA_Helper_Pager($sql,1);$pager->calcAllCount();//$rows = & $pager->findAll();trace($pager);////FLEA::loadClass('Nodes');//$nodes = & new Nodes();//$pager = & new FLEA_Helper_Pager($nodes,1);//trace($pager);    }}
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