Some fixes

[pevzi]

1. pressed and released with a dir argument now check the previous value so that they work as intended. Hope I understand the intended behavior correctly though.
2. pressed, released and isDown now return false instead of a result of the non-dir check when dir is provided and the condition is false.
3. gamepadButtons and gamepadAxis now ensure that a joystick with the given number exists before doing anything with it to avoid a blue screen when the joystick is not available.

[tesselode]

For 1 and 2, can you create a quick demo that shows the difference in behavior between the current version and your changes? I think I know what's going on with 2 (and good catch, btw), but I'm not sure what you meant by 1.

As for 3, yeahhh I need to get better about checking things for nil. Hoo boy.

[pevzi]

Just add the following lines to the demo and try pressing left and right:

  if Control.Horizontal:pressed(-1) then
    print("left pressed")
  end

  if Control.Horizontal:released(-1) then
    print("left released")
  end

Expected behavior: "left pressed" is printed once when I press left, "left released" is printed once when I release left.
Observed behavior: (1) both "left pressed" and "left released" are printed every frame while left is down, (2) "left pressed" is printed once when I press right, "left released" is printed once when I release right.

[tesselode]

Oh dear. That is....not correct. :P

Alright, well, all of your changes make perfect sense now! Thank you so much!