Removing notice when disk quotas are disabled

bureau/class/m_quota.php

@@ -148,7 +148,7 @@ class m_quota {
 	  $a=array(); 
 	  exec("/usr/lib/alternc/quota_get ".$cuid ,$a);
           $a[0]=intval($a[0]);
-          $a[1]=intval($a[1]);
+          $a[1]=@intval($a[1]);
 	  $this->quotas[$val]=array("name"=>"$val", 'description'=>_("quota_".$val), "t"=>$a[1],"u"=>$a[0]);
 	}