move joystick value at end of fields (allow sdl hdll backward compat, see #252)

libs/sdl/sdl.c

@@ -84,9 +84,9 @@ typedef struct {
 	int keyCode;
 	bool keyRepeat;
 	int controller;
-	int joystick;
 	int value;
 	int fingerId;
+	int joystick;
 } event_data;
 
 HL_PRIM bool HL_NAME(init_once)() {

libs/sdl/sdl/Event.hx

@@ -12,9 +12,9 @@ package sdl;
 	public var keyCode : Int;
 	public var keyRepeat : Bool;
 	public var controller : Int;
-	public var joystick : Int;
 	public var value : Int;
 	public var fingerId : Int;
+	public var joystick : Int;
 	public function new() {
 	}
 }