Use MACHINE_ARCH instead of MACHINE to check x86 architecture.
Use MACHINE_ARCH instead of MACHINE to check x86 architecture.

Pointed out by:	Akio Morita <amorita@meadow.scphys.kyoto-u.ac.jp>

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