Simplify rc code

Utilize the new method for getting channel values.

flix/rc.ino

@@ -27,14 +27,12 @@ void setupRC() {
 
 bool readRC() {
 	if (rcRxPin < 0) return false;
-	if (rc.read()) {
-		SBUSData data = rc.data();
-		for (int i = 0; i < 16; i++) channels[i] = data.ch[i]; // copy channels data
+	if (!rc.read()) return false;
+
+	rc.getChannels(channels);
 	normalizeRC();
 	controlTime = t;
 	return true;
-	}
-	return false;
 }
 
 void normalizeRC() {

gazebo/SBUS.h

@@ -15,12 +15,11 @@ public:
 	SBUS(HardwareSerial& bus, const int8_t rxpin, const int8_t txpin, const bool inv = true) {};
 	void begin(int rxpin = -1, int txpin = -1, bool inv = true, bool fast = false) {};
 	bool read() { return joystickInit(); };
-	SBUSData data() {
-		SBUSData data;
-		joystickGet(data.ch);
+	void getChannels(uint16_t (&channels)[16]) const {
+		int16_t ch[16];
+		joystickGet(ch);
 		for (int i = 0; i < 16; i++) {
-			data.ch[i] = map(data.ch[i], -32768, 32767, 1000, 2000); // convert to pulse width style
+			channels[i] = map(ch[i], -32768, 32767, 1000, 2000); // convert to pulse width style
 		}
-		return data;
 	};
 };