SSH2: fix possible E_NOTICE
SSH2: fix possible E_NOTICE
creatuity/phpseclib,danog/phpseclib,kenichiii/phpseclib,paragonie-scott/phpseclib,metaclassing/phpseclib,splitice/phpseclib,paragonie-scott/phpseclib,melya/phpseclib,thaigialai1987/phpseclib,creatuity/phpseclib,terrafrost/phpseclib,danog/phpseclib,thaigialai1987/phpseclib,phpseclib/phpseclib-php5,kenichiii/phpseclib,splitice/phpseclib,metaclassing/phpseclib,melya/phpseclib,phpseclib/phpseclib-php5,phpseclib/phpseclib