修复备份数据库操作，如果数据库名带“中横线”或者纯数字时的BUG

src/admin/sys_data_done.php

@@ -14,7 +14,7 @@ ini_set('memory_limit', '-1');
 require_once(dirname(__FILE__).'/config.php');
 if (DEDEBIZ_SAFE_MODE) {
     die(DedeAlert("系统已启用安全模式，无法使用当前功能",ALERT_DANGER));
-  }
+}
 CheckPurview('sys_Data');
 if (empty($dopost)) $dopost = '';
 $bkdir = DEDEDATA.'/'.$cfg_backup_dir;
@@ -69,7 +69,7 @@ if ($dopost == 'bak') {
             $fp = fopen($bkfile, "w");
             foreach ($tables as $t) {
                 fwrite($fp, "DROP TABLE IF EXISTS `$t`;\r\n\r\n");
-                $dsql->SetQuery("SHOW CREATE TABLE ".$dsql->dbName.".".$t);
+                $dsql->SetQuery("SHOW CREATE TABLE `".$dsql->dbName."`.".$t); //感谢：LandQ
                 $dsql->Execute('me');
                 $row = $dsql->GetArray('me', MYSQL_BOTH);
                 //去除AUTO_INCREMENT