Update runPlanet/ship.pde

Yo so, I changed the xpos and ypos to float cause it makes shit easier.
Because I did that, I had to cast some things to int throughout the code,
and I actually kinda forgot every place where I type casted things.
So if this changes gives you an error, then I did something in other files
and I can just save change those ones as well, but for now, just see it this
works.