When tables names contain special characters, fetch_numeric fails

[nasri-lab]

When tables names contain special characters ('-' in my case), the line 230 fails, you need to escape the name with `, the ligne should then be :

$tables = $this->db->fetch_numeric('SHOW FULL TABLES WHERE Table_Type = "BASE TABLE" AND Tables_in_'.$this->db->name.' LIKE "' . $this->db->escape_like($table_prefix) . '%" ');