Author :
Adam Langley
Date :
2016-10-12 17:49:17
Hash :6702da1a Message :Don't call BIO_number_{read|written} on NULL BIOs.
OpenSSL doesn't document the behaviour of these functions when given a
NULL BIO, and it happens to return zero at the moment. But don't depend
on that.
Closes: #406 (cherry-picked)