Update firebird.inc.php

FastCGI sent in stderr: "PHP message: PHP Parse error:  syntax error, unexpected '}' firebirdwebadmin/inc/firebird.inc.php on line 173" while reading response header from upstream, client: xxx.xxx.xxx.xxx, server: hostname.com, request: "GET /firebirdwebadmin/database.php HTTP/1.1", upstream: "fastcgi://unix:/var/run/php5-fpm.sock:", host: "hostname.com"