Set the %gs base to pcb_gsbase, not pcb_fsbase.  Oops.
Set the %gs base to pcb_gsbase, not pcb_fsbase.  Oops.

Discovered by:	davidxu

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