Fixup some CFFI problems.
Fixup some CFFI problems.

elitest/pyopenssl,mschmo/pyopenssl,aalba6675/pyopenssl,sholsapp/pyopenssl,aalba6675/pyopenssl,daodaoliang/pyopenssl,adamwolf/pyopenssl,mhils/pyopenssl,hynek/pyopenssl,hynek/pyopenssl,mhils/pyopenssl,mitghi/pyopenssl,r0ro/pyopenssl,pyca/pyopenssl,sorenh/pyopenssl,mitghi/pyopenssl,samv/pyopenssl,kjav/pyopenssl,r0ro/pyopenssl,reaperhulk/pyopenssl,reaperhulk/pyopenssl