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 Any attempt to operate on the MatPLC (i.e. getpt, setpt) before executing
"lplc init" causes the interpreter to exit.

	this is an implementation issue in the linxuplc.a library

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Any attempt to getpt, setpt, or update after executing "lplc done" results
in a seg fault.  a seg fault also results from an attempt to re-init the MatPLC
after executing "lplc done"

		lplc init ;# succeeds
		lplc done ;# succeeds
		lplc init ;# seg fault

	it is not yet known whether this is a bug in the interpreter or in the
	MatPLC library