Add triggers to 'getButton' function

These can already be treated as digital by the 'set' function, so we should be able to treat them as digital with the 'get' function as well. Any input greater than 0 is considered 'pressed' - other thresholds can be done by the user with the analog function.

Author: dmadison

src/XInput.cpp

@@ -370,9 +370,15 @@ void XInputController::setAutoSend(boolean a) {
 }
 
 boolean XInputController::getButton(uint8_t button) const {
-	const XInputMap_Button * buttonData = getButtonFromEnum((XInputControl) button);
-	if (buttonData == nullptr) return 0;  // Not a button
-	return tx[buttonData->index] & buttonData->mask;
+	const XInputMap_Button* buttonData = getButtonFromEnum((XInputControl) button);
+	if (buttonData != nullptr) {
+		return tx[buttonData->index] & buttonData->mask;
+	}
+	const XInputMap_Trigger* triggerData = getTriggerFromEnum((XInputControl) button);
+	if (triggerData != nullptr) {
+		return getTrigger((XInputControl) button) != 0 ? 1 : 0;
+	}
+	return 0;  // Not a button or a trigger
 }
 
 boolean XInputController::getDpad(XInputControl dpad) const {