Quick crouching will "stick" the button

[Seth Hetu]

If you tap the down arrow, Iji will bob up and down uncontrollably. Pressing down for ~1s resolves the issue.

[Seth Hetu]

Ok, this is due to Iji's motion-based state machine relying on image_index, which is being incorrectly reset by image_single. Consider:

image_index = 3;
image_single = 1;
image_index = 0;
image_single = -1;

...image_index should be 0, but ENIGMA sets it to 3.

This is an oversight in my image_single implementation. Fixing it (correctly) will also probably fix the "Iji is knocked down directly after standing up" bug.

[Seth Hetu]

Fixed with the latest commit. The new image_single implementation is as simple as possible, to reduce further bugs.