Fixes subtle SSL recvInto bug.
Fixes subtle SSL recvInto bug.

This resulted in a "value out of range: -1" exception inside `recvInto`
(on the `copyMem` line). Basically readIntoBuf was returning `-1`.

dom96/Nim,dom96/Nim,dom96/Nim,dom96/Nim,dom96/Nim,dom96/Nim,dom96/Nim