Don't cast ioctl FIONREAD's argument to struct sgttyb *. This makes no function changes, but removes an unnecessary reference to a deprecated struct.
Don't cast ioctl FIONREAD's argument to struct sgttyb *. This makes
no function changes, but removes an unnecessary reference to a
deprecated struct.

Obtained from:	NetBSD (thorpej)

jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase