Pose parameter hitbox bug example: engineer robot

One of the more egregious cases. I found this one amusing, as different incorrect things happen depending on the particular direction the player is moving. Both of the engie bot model's arms flail around in a stupid manner even in the absence of game glitches; the model is just simply that bad. (It's even worse of an inconsistent, rushed mess than the other MvM player models, if you can believe that.) Also, despite the human engie player model having its missing pelvis hitbox fixed, the robot engie still lacks it.