Extend segfault workaround to PHP versions below 5.4.
Extend segfault workaround to PHP versions below 5.4.

thaigialai1987/phpseclib,thaigialai1987/phpseclib,kenichiii/phpseclib,kenichiii/phpseclib,metaclassing/phpseclib,metaclassing/phpseclib,melya/phpseclib,paragonie-scott/phpseclib,danog/phpseclib,danog/phpseclib,melya/phpseclib,phpseclib/phpseclib,splitice/phpseclib,terrafrost/phpseclib,paragonie-scott/phpseclib,creatuity/phpseclib,splitice/phpseclib,creatuity/phpseclib