default void setVar(Register reg, T val) {
		Address address = reg.getAddress();
		setVar(address.getAddressSpace(), address.getOffset(), reg.getMinimumByteSize(), true, val);
	}
Set the value of a register variable

@param reg the register
@param val the value
Ghidra/Framework/Emulation/src/main/java/ghidra/pcode/exec/PcodeExecutorStatePiece.java