The `yaw` value of non-client-players is constraint to [0; 360), so when that
boundary is crossed, the `renderYaw` starts interpolating to its goal the
incorrect way round (instead of crossing the 360 boundary as well).
To fix that, we now add the difference between the current `renderYaw` and the
desired one, modulo 360 (but with range (-180; 180]), to the current
`renderYaw`. That way we always take the short way round.
Additionally, because for rendering MC looks at the difference without modulo,
afterwards (and when a new `yaw` is set) we wrap the result around such that the
actual difference is always less than 180 and therefore rendered as intended.
1b18b5c952