AbstractControllerTestCase's count not compatible with PHP 7.2

[bitwombat]

This line and similar:

https://github.com/zendframework/zend-test/blob/master/src/PHPUnit/Controller/AbstractControllerTestCase.php#L252

Rely on count, whose behavior has changed in PHP 7.2: http://php.net/manual/en/migration72.incompatible.php#migration72.incompatible.warn-on-non-countable-types

I think the fix is a simple boolean, taking advantage of short-circuit and behavior:

$params_exist = ( (null !==$params) && (count($params) > 0));

Will make that a PR if I'm not off the mark.

[michalbundyra]

@bitwombat In case $params can be only array|null and we check count($params) != 0 we can replace if with simply if ($params) and it will give us exactly the same result.

PR is very welcome ! 👍

[michalbundyra]

Fixed in #63

[bitwombat]

Beat me to it! Good work.