Adding the missing _int pinMode for I2C

Author: PaulZC

src/SparkFun_BNO080_Arduino_Library.cpp

@@ -30,7 +30,11 @@ boolean BNO080::begin(uint8_t deviceAddress, TwoWire &wirePort, uint8_t intPin)
 {
 	_deviceAddress = deviceAddress; //If provided, store the I2C address from user
 	_i2cPort = &wirePort;			//Grab which port the user wants us to use
-	_int = intPin;					//Get the pin that the user wants to use for interrupts. By default, it's NULL and we'll not use it in dataAvailable() function.
+	_int = intPin;					//Get the pin that the user wants to use for interrupts. By default, it's 255 and we'll not use it in dataAvailable() function.
+	if (_int != 255)
+	{
+		pinMode(_int, INPUT_PULLUP);
+	}
 
 	//We expect caller to begin their I2C port, with the speed of their choice external to the library
 	//But if they forget, we start the hardware here.