Add intval to the sys_language_uid value in TceMain.php

The save-and-show button was failing the validation in Eid.php:validateAuthCode
By adding intval to $recordArray['sys_language_uid'] the NULL value becomes a 0 thus passing the validation.
Merge pull request #5 from einarsvan/master

Add intval to the sys_language_uid value in TceMain.php