Call PQConsumeInput() again after PQisBusy().
Call PQConsumeInput() again after PQisBusy().

Prevents a stall in case there is still data in the read end of the socket
but PQisBusy() told us to not fetch a result yet. In that case we end up
stalling due to epoll not giving us another EPOLLIN event due to EPOLLET.

jorisvink/kore,jorisvink/kore