switch deviceAddress to the Wire library's preferred data type

sx1509_library.cpp

@@ -31,7 +31,7 @@
 sx1509Class::sx1509Class(byte address, byte resetPin, byte interruptPin, byte oscillatorPin)
 {
 	// Store the received parameters into member variables
-	deviceAddress =  address;
+	deviceAddress =  (uint8_t)address;
 	pinInterrupt = interruptPin;
 	pinOscillator = oscillatorPin;
 	pinReset = resetPin;

sx1509_library.h

@@ -43,7 +43,7 @@ class sx1509Class
 private:	// These private functions are not available to Arduino sketches.
 			// If you need to read or write directly to registers, consider
 			// putting the writeByte, readByte functions in the public section
-	byte deviceAddress; // I2C Address of SX1509
+	uint8_t deviceAddress; // I2C Address of SX1509
 // Pin definitions:
 	byte pinInterrupt;
 	byte pinOscillator;