NES/SNES Input pins changed to Pullup

There was noisy random input. Setting to pullup alleviates this.

RetroJoystickAdapter.ino

@@ -319,10 +319,10 @@ void interpretJoystickState(uint8_t j, uint8_t *status) {
 void setupJoysticks() {
   pinMode(LATCH1, OUTPUT);
   pinMode(CLOCK1, OUTPUT);
-  pinMode(DATA1, INPUT);
+  pinMode(DATA1, INPUT_PULLUP);
   pinMode(LATCH2, OUTPUT);
   pinMode(CLOCK2, OUTPUT);
-  pinMode(DATA2, INPUT);
+  pinMode(DATA2, INPUT_PULLUP);
 }
 
 #define latchlow digitalWrite(LATCH1, LOW); digitalWrite(LATCH2, LOW);