Makes `CelSprite` unowned and adds a new `OwnedCelSprite` class for
owned sprites.
This clarifies ownership and makes the code cleaner in a number of
places.
Additionally, because the `CelSprite` class is now tiny (1 less
pointer), we can pass it by-value instead of by-reference, removing a
pointer indirection in the rendering functions.
Readied spell can be swapped to something else in between the cast and the hit frame, resulting in incorrect removal.
This is how currently belt scrolls are checked so we are now using a consistent strategy.
This mostly change player to be by reference instead of by index.
But additionally it does stript checks for gold in the belt, move some
value types to the initialization and short circute a few functiongs.
staphen
ephphatha
Gleb Mazovetskiy
Juliano Leal Goncalves
Anders Jenbo
Łukasz Łapiński