fixes bug to product detail page to remove check is down status

@@ -310,7 +310,7 @@ class DetailModel
 
                 $referenceList = array();
                 // 判断是否显示参考尺码
-                $showReference = $boyReference || $girlReference;
+                $showReference = ($boyReference && !empty($sizeInfo['sizeInfoBo']['sizeBoList'][0]['boyReferSize'])) || ($girlReference && !empty($sizeInfo['sizeInfoBo']['sizeBoList'][0]['girlReferSize']));
                 if ($showReference) {
                     $referenceList[0] = array('param' => $referenceName);
                 }