Fixed #657 -- handle OverflowErrors on large allocation requests (#659)
Fixed #657 -- handle OverflowErrors on large allocation requests (#659)

* Fixed #657 -- handle OverflowErrors on large allocation requests

* always be overflowing

hynek/pyopenssl,reaperhulk/pyopenssl,reaperhulk/pyopenssl,hynek/pyopenssl,pyca/pyopenssl