Add explicit enum values to remaining buttons

Again, not really necessary because these should be implicit given the previous values and the type. But making them explicit to indicate intent.

Using numbers indexed from 0 here to allow the user to do a for loop to set all of the buttons from say a packed 16-bit value.

Author: dmadison

src/XInput.h

@@ -31,7 +31,7 @@
 
 enum XInputControl : uint8_t {
 	BUTTON_LOGO = 0,
-	BUTTON_A  = 1,
+	BUTTON_A = 1,
 	BUTTON_B = 2,
 	BUTTON_X = 3,
 	BUTTON_Y = 4,
@@ -41,12 +41,12 @@ enum XInputControl : uint8_t {
 	BUTTON_START = 8,
 	BUTTON_L3 = 9,
 	BUTTON_R3 = 10,
-	DPAD_UP,
-	DPAD_DOWN,
-	DPAD_LEFT,
-	DPAD_RIGHT,
-	TRIGGER_LEFT,
-	TRIGGER_RIGHT,
+	DPAD_UP = 11,
+	DPAD_DOWN = 12,
+	DPAD_LEFT = 13,
+	DPAD_RIGHT = 14,
+	TRIGGER_LEFT = 15,
+	TRIGGER_RIGHT = 16,
 	JOY_LEFT,
 	JOY_RIGHT,
 };