ZF-7667: Fix validation of integers to use a protected method instead of type casting to int as they integers are over the 2^31 (2147483647) limit of 32 bit machines.
git-svn-id: http://framework.zend.com/svn/framework/standard/trunk@18099 44c647ce-9c0f-0410-b52a-842ac1e357ba
sidhighwind