This test checks the empty parameter values (bug #63). The template should
be executed properly.

>>>>templates/test.tpl
<?xml version="1.0" encoding="UTF-8" standalone="yes" ?>
<opt:component from="$component" bar="">
<opt:set name="foo" value="" />
FOO
</opt:component>

>>>>data.php

$view->component = new myComponent;

>>>>expected.txt
Opt_AttributeEmpty_Exception