Fix panic in CTL caused by trying to free invalid pointers passed by the userland process via the IOCTL interface.
Fix panic in CTL caused by trying to free invalid pointers passed
by the userland process via the IOCTL interface.

Reviewed by:	ken@

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