SFTP: Fix bug whereby sometimes download amount would be ignored
SFTP: Fix bug whereby sometimes download amount would be ignored

phpseclib/phpseclib-php5,melya/phpseclib,kenichiii/phpseclib,creatuity/phpseclib,metaclassing/phpseclib,phpseclib/phpseclib,terrafrost/phpseclib,ericariyanto/phpseclib,splitice/phpseclib,danog/phpseclib,creatuity/phpseclib,splitice/phpseclib,thaigialai1987/phpseclib,metaclassing/phpseclib,paragonie-scott/phpseclib,phpseclib/phpseclib-php5,thaigialai1987/phpseclib,melya/phpseclib,paragonie-scott/phpseclib,danog/phpseclib,kenichiii/phpseclib,ericariyanto/phpseclib