Fixed FRCSim artf2609 - double ports handled wrong.

Change-Id: I2dc59c8d3113f3024d237763eb4e2f94bb85ff1a

wpilibc/wpilibC++Sim/include/Encoder.h

@@ -70,7 +70,7 @@ private:
 	double m_distancePerPulse;		// distance of travel for each encoder tick
 	EncodingType m_encodingType;	// Encoding type
 	PIDSourceParameter m_pidSource;	// Encoder parameter that sources a PID controller
-	bool reversed;
+	bool m_reverseDirection;
 	SimEncoder* impl;
 
 	ITable *m_table;